Update, remove or redirect the dashboard menu item.
<?php
return [
'wp-admin.$role|$username' => [
'dashboard',
'dashboard' => (string) $route,
'dashboard.title' => (string) $title,
'dashboard.icon' => (string) $dashicon,
],
];
Remove from menu;
<?php
return [
'wp-admin.$role|$username' => [
'dashboard',
],
];
Remove from menu and enforce a page redirect;
<?php
return [
'wp-admin.$role|$username' => [
'dashboard' => 'posts',
],
];