diff --git a/src/lib/es2023.array.d.ts b/src/lib/es2023.array.d.ts
index 1f90ae3396164..a5cc73ae0f963 100644
--- a/src/lib/es2023.array.d.ts
+++ b/src/lib/es2023.array.d.ts
@@ -21,6 +21,50 @@ interface Array<T> {
      * predicate. If it is not provided, undefined is used instead.
      */
     findLastIndex(predicate: (value: T, index: number, array: T[]) => unknown, thisArg?: any): number;
+
+    /**
+     * Returns a copy of an array with its elements reversed.
+     */
+    toReversed(): T[];
+
+    /**
+     * Returns a copy of an array with its elements sorted.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * [11, 2, 22, 1].toSorted((a, b) => a - b) // [1, 2, 11, 22]
+     * ```
+     */
+    toSorted(compareFn?: (a: T, b: T) => number): T[];
+
+    /**
+     * Copies an array and removes elements and, if necessary, inserts new elements in their place. Returns the copied array.
+     * @param start The zero-based location in the array from which to start removing elements.
+     * @param deleteCount The number of elements to remove.
+     * @param items Elements to insert into the copied array in place of the deleted elements.
+     * @returns The copied array.
+     */
+    toSpliced(start: number, deleteCount: number, ...items: T[]): T[];
+
+    /**
+     * Copies an array and removes elements while returning the remaining elements.
+     * @param start The zero-based location in the array from which to start removing elements.
+     * @param deleteCount The number of elements to remove.
+     * @returns A copy of the original array with the remaining elements.
+     */
+    toSpliced(start: number, deleteCount?: number): T[];
+
+    /**
+     * Copies an array, then overwrites the value at the provided index with the
+     * given value. If the index is negative, then it replaces from the end
+     * of the array.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to write into the copied array.
+     * @returns The copied array with the updated value.
+     */
+    with(index: number, value: T): T[];
 }
 
 interface ReadonlyArray<T> {
@@ -33,8 +77,14 @@ interface ReadonlyArray<T> {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends T>(predicate: (value: T, index: number, array: readonly T[]) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: T, index: number, array: readonly T[]) => unknown, thisArg?: any): T | undefined;
+    findLast<S extends T>(
+        predicate: (value: T, index: number, array: readonly T[]) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (value: T, index: number, array: readonly T[]) => unknown,
+        thisArg?: any
+    ): T | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -45,7 +95,54 @@ interface ReadonlyArray<T> {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: T, index: number, array: readonly T[]) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (value: T, index: number, array: readonly T[]) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copied array with all of its elements reversed.
+     */
+    toReversed(): T[];
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * [11, 2, 22, 1].toSorted((a, b) => a - b) // [1, 2, 11, 22]
+     * ```
+     */
+    toSorted(compareFn?: (a: T, b: T) => number): T[];
+
+    /**
+     * Copies an array and removes elements while, if necessary, inserting new elements in their place, returning the remaining elements.
+     * @param start The zero-based location in the array from which to start removing elements.
+     * @param deleteCount The number of elements to remove.
+     * @param items Elements to insert into the copied array in place of the deleted elements.
+     * @returns A copy of the original array with the remaining elements.
+     */
+    toSpliced(start: number, deleteCount: number, ...items: T[]): T[];
+
+    /**
+     * Copies an array and removes elements while returning the remaining elements.
+     * @param start The zero-based location in the array from which to start removing elements.
+     * @param deleteCount The number of elements to remove.
+     * @returns A copy of the original array with the remaining elements.
+     */
+    toSpliced(start: number, deleteCount?: number): T[];
+
+    /**
+     * Copies an array, then overwrites the value at the provided index with the
+     * given value. If the index is negative, then it replaces from the end
+     * of the array
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: T): T[];
 }
 
 interface Int8Array {
@@ -58,8 +155,18 @@ interface Int8Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends number>(predicate: (value: number, index: number, array: Int8Array) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: number, index: number, array: Int8Array) => unknown, thisArg?: any): number | undefined;
+    findLast<S extends number>(
+        predicate: (
+            value: number,
+            index: number,
+            array: Int8Array
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (value: number, index: number, array: Int8Array) => unknown,
+        thisArg?: any
+    ): number | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -70,7 +177,36 @@ interface Int8Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: number, index: number, array: Int8Array) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (value: number, index: number, array: Int8Array) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): Uint8Array;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = Uint8Array.from([11, 2, 22, 1]);
+     * myNums.toSorted((a, b) => a - b) // Uint8Array(4) [1, 2, 11, 22]
+     * ```
+     */
+    toSorted(compareFn?: (a: number, b: number) => number): Uint8Array;
+
+    /**
+     * Copies the array and inserts the given number at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: number): Uint8Array;
 }
 
 interface Uint8Array {
@@ -83,8 +219,18 @@ interface Uint8Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends number>(predicate: (value: number, index: number, array: Uint8Array) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: number, index: number, array: Uint8Array) => unknown, thisArg?: any): number | undefined;
+    findLast<S extends number>(
+        predicate: (
+            value: number,
+            index: number,
+            array: Uint8Array
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (value: number, index: number, array: Uint8Array) => unknown,
+        thisArg?: any
+    ): number | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -95,7 +241,36 @@ interface Uint8Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: number, index: number, array: Uint8Array) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (value: number, index: number, array: Uint8Array) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): Uint8Array;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = Uint8Array.from([11, 2, 22, 1]);
+     * myNums.toSorted((a, b) => a - b) // Uint8Array(4) [1, 2, 11, 22]
+     * ```
+     */
+    toSorted(compareFn?: (a: number, b: number) => number): Uint8Array;
+
+    /**
+     * Copies the array and inserts the given number at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: number): Uint8Array;
 }
 
 interface Uint8ClampedArray {
@@ -108,8 +283,22 @@ interface Uint8ClampedArray {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends number>(predicate: (value: number, index: number, array: Uint8ClampedArray) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: number, index: number, array: Uint8ClampedArray) => unknown, thisArg?: any): number | undefined;
+    findLast<S extends number>(
+        predicate: (
+            value: number,
+            index: number,
+            array: Uint8ClampedArray
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (
+            value: number,
+            index: number,
+            array: Uint8ClampedArray
+        ) => unknown,
+        thisArg?: any
+    ): number | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -120,7 +309,40 @@ interface Uint8ClampedArray {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: number, index: number, array: Uint8ClampedArray) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (
+            value: number,
+            index: number,
+            array: Uint8ClampedArray
+        ) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): Uint8ClampedArray;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = Uint8ClampedArray.from([11, 2, 22, 1]);
+     * myNums.toSorted((a, b) => a - b) // Uint8ClampedArray(4) [1, 2, 11, 22]
+     * ```
+     */
+    toSorted(compareFn?: (a: number, b: number) => number): Uint8ClampedArray;
+
+    /**
+     * Copies the array and inserts the given number at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: number): Uint8ClampedArray;
 }
 
 interface Int16Array {
@@ -133,8 +355,18 @@ interface Int16Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends number>(predicate: (value: number, index: number, array: Int16Array) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: number, index: number, array: Int16Array) => unknown, thisArg?: any): number | undefined;
+    findLast<S extends number>(
+        predicate: (
+            value: number,
+            index: number,
+            array: Int16Array
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (value: number, index: number, array: Int16Array) => unknown,
+        thisArg?: any
+    ): number | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -145,7 +377,36 @@ interface Int16Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: number, index: number, array: Int16Array) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (value: number, index: number, array: Int16Array) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): Int16Array;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = Int16Array.from([11, 2, -22, 1]);
+     * myNums.toSorted((a, b) => a - b) // Int16Array(4) [-22, 1, 2, 11]
+     * ```
+     */
+    toSorted(compareFn?: (a: number, b: number) => number): Int16Array;
+
+    /**
+     * Copies the array and inserts the given number at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: number): Int16Array;
 }
 
 interface Uint16Array {
@@ -158,8 +419,22 @@ interface Uint16Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends number>(predicate: (value: number, index: number, array: Uint16Array) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: number, index: number, array: Uint16Array) => unknown, thisArg?: any): number | undefined;
+    findLast<S extends number>(
+        predicate: (
+            value: number,
+            index: number,
+            array: Uint16Array
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (
+            value: number,
+            index: number,
+            array: Uint16Array
+        ) => unknown,
+        thisArg?: any
+    ): number | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -170,7 +445,40 @@ interface Uint16Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: number, index: number, array: Uint16Array) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (
+            value: number,
+            index: number,
+            array: Uint16Array
+        ) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): Uint16Array;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = Uint16Array.from([11, 2, 22, 1]);
+     * myNums.toSorted((a, b) => a - b) // Uint16Array(4) [1, 2, 11, 22]
+     * ```
+     */
+    toSorted(compareFn?: (a: number, b: number) => number): Uint16Array;
+
+    /**
+     * Copies the array and inserts the given number at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: number): Uint16Array;
 }
 
 interface Int32Array {
@@ -183,8 +491,18 @@ interface Int32Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends number>(predicate: (value: number, index: number, array: Int32Array) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: number, index: number, array: Int32Array) => unknown, thisArg?: any): number | undefined;
+    findLast<S extends number>(
+        predicate: (
+            value: number,
+            index: number,
+            array: Int32Array
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (value: number, index: number, array: Int32Array) => unknown,
+        thisArg?: any
+    ): number | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -195,7 +513,36 @@ interface Int32Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: number, index: number, array: Int32Array) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (value: number, index: number, array: Int32Array) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): Int32Array;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = Int32Array.from([11, 2, -22, 1]);
+     * myNums.toSorted((a, b) => a - b) // Int32Array(4) [-22, 1, 2, 11]
+     * ```
+     */
+    toSorted(compareFn?: (a: number, b: number) => number): Int32Array;
+
+    /**
+     * Copies the array and inserts the given number at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: number): Int32Array;
 }
 
 interface Uint32Array {
@@ -208,8 +555,22 @@ interface Uint32Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends number>(predicate: (value: number, index: number, array: Uint32Array) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: number, index: number, array: Uint32Array) => unknown, thisArg?: any): number | undefined;
+    findLast<S extends number>(
+        predicate: (
+            value: number,
+            index: number,
+            array: Uint32Array
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (
+            value: number,
+            index: number,
+            array: Uint32Array
+        ) => unknown,
+        thisArg?: any
+    ): number | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -220,7 +581,40 @@ interface Uint32Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: number, index: number, array: Uint32Array) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (
+            value: number,
+            index: number,
+            array: Uint32Array
+        ) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): Uint32Array;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = Uint32Array.from([11, 2, 22, 1]);
+     * myNums.toSorted((a, b) => a - b) // Uint32Array(4) [1, 2, 11, 22]
+     * ```
+     */
+    toSorted(compareFn?: (a: number, b: number) => number): Uint32Array;
+
+    /**
+     * Copies the array and inserts the given number at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: number): Uint32Array;
 }
 
 interface Float32Array {
@@ -233,8 +627,22 @@ interface Float32Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends number>(predicate: (value: number, index: number, array: Float32Array) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: number, index: number, array: Float32Array) => unknown, thisArg?: any): number | undefined;
+    findLast<S extends number>(
+        predicate: (
+            value: number,
+            index: number,
+            array: Float32Array
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (
+            value: number,
+            index: number,
+            array: Float32Array
+        ) => unknown,
+        thisArg?: any
+    ): number | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -245,7 +653,40 @@ interface Float32Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: number, index: number, array: Float32Array) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (
+            value: number,
+            index: number,
+            array: Float32Array
+        ) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): Float32Array;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = Float32Array.from([11.25, 2, -22.5, 1]);
+     * myNums.toSorted((a, b) => a - b) // Float32Array(4) [-22.5, 1, 2, 11.5]
+     * ```
+     */
+    toSorted(compareFn?: (a: number, b: number) => number): Float32Array;
+
+    /**
+     * Copies the array and inserts the given number at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: number): Float32Array;
 }
 
 interface Float64Array {
@@ -258,8 +699,22 @@ interface Float64Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends number>(predicate: (value: number, index: number, array: Float64Array) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: number, index: number, array: Float64Array) => unknown, thisArg?: any): number | undefined;
+    findLast<S extends number>(
+        predicate: (
+            value: number,
+            index: number,
+            array: Float64Array
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (
+            value: number,
+            index: number,
+            array: Float64Array
+        ) => unknown,
+        thisArg?: any
+    ): number | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -270,7 +725,40 @@ interface Float64Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: number, index: number, array: Float64Array) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (
+            value: number,
+            index: number,
+            array: Float64Array
+        ) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): Float64Array;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = Float64Array.from([11.25, 2, -22.5, 1]);
+     * myNums.toSorted((a, b) => a - b) // Float64Array(4) [-22.5, 1, 2, 11.5]
+     * ```
+     */
+    toSorted(compareFn?: (a: number, b: number) => number): Float64Array;
+
+    /**
+     * Copies the array and inserts the given number at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: number): Float64Array;
 }
 
 interface BigInt64Array {
@@ -283,8 +771,22 @@ interface BigInt64Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends bigint>(predicate: (value: bigint, index: number, array: BigInt64Array) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: bigint, index: number, array: BigInt64Array) => unknown, thisArg?: any): bigint | undefined;
+    findLast<S extends bigint>(
+        predicate: (
+            value: bigint,
+            index: number,
+            array: BigInt64Array
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (
+            value: bigint,
+            index: number,
+            array: BigInt64Array
+        ) => unknown,
+        thisArg?: any
+    ): bigint | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -295,7 +797,40 @@ interface BigInt64Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: bigint, index: number, array: BigInt64Array) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (
+            value: bigint,
+            index: number,
+            array: BigInt64Array
+        ) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): BigInt64Array;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = BigInt64Array.from([11n, 2n, -22n, 1n]);
+     * myNums.toSorted((a, b) => Number(a - b)) // BigInt64Array(4) [-22n, 1n, 2n, 11n]
+     * ```
+     */
+    toSorted(compareFn?: (a: bigint, b: bigint) => number): BigInt64Array;
+
+    /**
+     * Copies the array and inserts the given bigint at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: bigint): BigInt64Array;
 }
 
 interface BigUint64Array {
@@ -308,8 +843,22 @@ interface BigUint64Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLast<S extends bigint>(predicate: (value: bigint, index: number, array: BigUint64Array) => value is S, thisArg?: any): S | undefined;
-    findLast(predicate: (value: bigint, index: number, array: BigUint64Array) => unknown, thisArg?: any): bigint | undefined;
+    findLast<S extends bigint>(
+        predicate: (
+            value: bigint,
+            index: number,
+            array: BigUint64Array
+        ) => value is S,
+        thisArg?: any
+    ): S | undefined;
+    findLast(
+        predicate: (
+            value: bigint,
+            index: number,
+            array: BigUint64Array
+        ) => unknown,
+        thisArg?: any
+    ): bigint | undefined;
 
     /**
      * Returns the index of the last element in the array where predicate is true, and -1
@@ -320,5 +869,38 @@ interface BigUint64Array {
      * @param thisArg If provided, it will be used as the this value for each invocation of
      * predicate. If it is not provided, undefined is used instead.
      */
-    findLastIndex(predicate: (value: bigint, index: number, array: BigUint64Array) => unknown, thisArg?: any): number;
+    findLastIndex(
+        predicate: (
+            value: bigint,
+            index: number,
+            array: BigUint64Array
+        ) => unknown,
+        thisArg?: any
+    ): number;
+
+    /**
+     * Copies the array and returns the copy with the elements in reverse order.
+     */
+    toReversed(): BigUint64Array;
+
+    /**
+     * Copies and sorts the array.
+     * @param compareFn Function used to determine the order of the elements. It is expected to return
+     * a negative value if the first argument is less than the second argument, zero if they're equal, and a positive
+     * value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
+     * ```ts
+     * const myNums = BigUint64Array.from([11n, 2n, 22n, 1n]);
+     * myNums.toSorted((a, b) => Number(a - b)) // BigUint64Array(4) [1n, 2n, 11n, 22n]
+     * ```
+     */
+    toSorted(compareFn?: (a: bigint, b: bigint) => number): BigUint64Array;
+
+    /**
+     * Copies the array and inserts the given bigint at the provided index.
+     * @param index The index of the value to overwrite. If the index is
+     * negative, then it replaces from the end of the array.
+     * @param value The value to insert into the copied array.
+     * @returns A copy of the original array with the inserted value.
+     */
+    with(index: number, value: bigint): BigUint64Array;
 }