diff --git a/src/plugins/expressions/common/executor/executor.ts b/src/plugins/expressions/common/executor/executor.ts
index f45f462df17bc..5c27201b43fc0 100644
--- a/src/plugins/expressions/common/executor/executor.ts
+++ b/src/plugins/expressions/common/executor/executor.ts
@@ -112,6 +112,10 @@ export class Executor<Context extends Record<string, unknown> = Record<string, u
     this.state.transitions.addFunction(fn);
   }
 
+  public getFunction(name: string): ExpressionFunction | undefined {
+    return this.state.get().functions[name];
+  }
+
   public getFunctions(): Record<string, ExpressionFunction> {
     return { ...this.state.get().functions };
   }
@@ -125,6 +129,10 @@ export class Executor<Context extends Record<string, unknown> = Record<string, u
     this.state.transitions.addType(type);
   }
 
+  public getType(name: string): ExpressionType | undefined {
+    return this.state.get().types[name];
+  }
+
   public getTypes(): Record<string, ExpressionType> {
     return { ...this.state.get().types };
   }
diff --git a/src/plugins/expressions/common/service/expressions_services.ts b/src/plugins/expressions/common/service/expressions_services.ts
index 037b997fffb36..8543fbe0fced2 100644
--- a/src/plugins/expressions/common/service/expressions_services.ts
+++ b/src/plugins/expressions/common/service/expressions_services.ts
@@ -120,17 +120,21 @@ export class ExpressionsService {
   public setup() {
     const { executor, renderers, registerFunction, run } = this;
 
+    const getFunction = executor.getFunction.bind(executor);
     const getFunctions = executor.getFunctions.bind(executor);
     const getRenderer = renderers.get.bind(renderers);
     const getRenderers = renderers.toJS.bind(renderers);
+    const getType = executor.getType.bind(executor);
     const getTypes = executor.getTypes.bind(executor);
     const registerRenderer = renderers.register.bind(renderers);
     const registerType = executor.registerType.bind(executor);
 
     return {
+      getFunction,
       getFunctions,
       getRenderer,
       getRenderers,
+      getType,
       getTypes,
       registerFunction,
       registerRenderer,
@@ -142,15 +146,19 @@ export class ExpressionsService {
   public start() {
     const { executor, renderers, run } = this;
 
+    const getFunction = executor.getFunction.bind(executor);
     const getFunctions = executor.getFunctions.bind(executor);
     const getRenderer = renderers.get.bind(renderers);
     const getRenderers = renderers.toJS.bind(renderers);
+    const getType = executor.getType.bind(executor);
     const getTypes = executor.getTypes.bind(executor);
 
     return {
+      getFunction,
       getFunctions,
       getRenderer,
       getRenderers,
+      getType,
       getTypes,
       run,
     };
diff --git a/src/plugins/expressions/public/plugin.ts b/src/plugins/expressions/public/plugin.ts
index f71cf5417062f..6799b1590f252 100644
--- a/src/plugins/expressions/public/plugin.ts
+++ b/src/plugins/expressions/public/plugin.ts
@@ -140,7 +140,7 @@ export class ExpressionsPublicPlugin
           // function that matches its definition, but which simply
           // calls the server-side function endpoint.
           Object.keys(serverFunctionList).forEach(functionName => {
-            if (functions.get(functionName)) {
+            if (expressionsSetup.getFunction(functionName)) {
               return;
             }
             const fn = () => ({