create wordpress admin menu links and sub links dynamically with external redirects functionality

admin_menu_pages.php

<?php

function idl_menu_build_data() {
	$data = [
		[
			'slug'              => 'rtdhrt',
			'page_title'        => 'first page',
			'menu_title'        => 'first page',
			'cap'               => 'manage_options',
			'callable_function' => '',//write a function that holds all content of this page or leave it empty to listen to the redirect url
			'redirect_url'      => 'https://google.com',
			'icon_url'          => false,
			'position_number'   => 15,
			'children'          => [
				[
					'slug'              => 'tger',
					'page_title'        => 'etertrer sub',
					'menu_title'        => 'fiereetrrst sub',
					'cap'               => 'manage_options',
					'callable_function' => '',//write a function that holds all content of this page or leave it empty to listen to the redirect url
					'redirect_url'      => 'https://google.com',
				],
				[
					'slug'              => 'rtjdse',
					'page_title'        => 'second sub',
					'menu_title'        => 'second sub',
					'cap'               => 'manage_options',
					'callable_function' => '',//write a function that holds all content of this page or leave it empty to listen to the redirect url
					'redirect_url'      => 'https://google.com',
				],
				[
					'slug'              => 'rtyhktur',
					'page_title'        => 'third sub',
					'menu_title'        => 'third sub',
					'cap'               => 'read',
					'callable_function' => '',//write a function that holds all content of this page or leave it empty to listen to the redirect url
					'redirect_url'      => 'https://google.com',
				],
			]
		],

		[
			'slug'              => 'rteytudhrt',
			'page_title'        => 'second page',
			'menu_title'        => 'second page',
			'cap'               => 'manage_options',
			'callable_function' => 'wdl_welcome_page_content',
			'redirect_url'      => 'https://google.com',
			'icon_url'          => false,
			'position_number'   => 20,
			'children'          => [
				[
					'slug'              => 'tgetrtr',
					'page_title'        => 'first sub',
					'menu_title'        => 'first sub',
					'cap'               => 'manage_options',
					'callable_function' => '',//write a function that holds all content of this page or leave it empty to listen to the redirect url
					'redirect_url'      => 'https://google.com',
				],
				[
					'slug'              => 'rrttjdse',
					'page_title'        => 'second sub',
					'menu_title'        => 'second sub',
					'cap'               => 'manage_options',
					'callable_function' => '',//write a function that holds all content of this page or leave it empty to listen to the redirect url
					'redirect_url'      => 'https://google.com',
				],
				[
					'slug'              => 'rtyuyjkhktur',
					'page_title'        => 'third sub',
					'menu_title'        => 'third sub',
					'cap'               => 'read',
					'callable_function' => '',//write a function that holds all content of this page or leave it empty to listen to the redirect url
					'redirect_url'      => 'https://google.com',
				],
			]
		],
	];

	return apply_filters( 'idl_menu_build', $data );
}

add_action( 'admin_menu', 'idl_welcome_page' );
function idl_welcome_page() {
	$menus_data = idl_menu_build_data();
	foreach ( $menus_data as $menu_item ) {
		add_menu_page(
			$menu_item['page_title'],
			$menu_item['menu_title'],
			$menu_item['cap'],
			$menu_item['slug'],
			empty( $menu_item['callable_function'] ) ? function(){} : $menu_item['callable_function'],
			$menu_item['icon_url'],
			$menu_item['position_number']
		);
		if ( isset( $menu_item['children'] ) && ! empty( $menu_item['children'] ) ) {
			foreach ( $menu_item['children'] as $child ) {
				add_submenu_page(
					$menu_item['slug'],
					$child['page_title'],
					$child['menu_title'],
					$child['cap'],
					$child['slug'],
					empty( $child['callable_function'] ) ? function(){} : $child['callable_function']
				);
			}
		}
	}
}

add_action( 'admin_init', 'idl_menu_item_redirect' );
function idl_menu_item_redirect() {
	$menus_data    = idl_menu_build_data();
	$menu_redirect = isset( $_GET['page'] ) ? $_GET['page'] : false;
	foreach ( $menus_data as $menu_item ) {
		if ( $menu_redirect == $menu_item['slug'] ) {
			wp_redirect( $menu_item['redirect_url'] );
			exit();
		}
		if ( isset( $menu_item['children'] ) && ! empty( $menu_item['children'] ) ) {
			foreach ( $menu_item['children'] as $child ) {
				if ( $menu_redirect == $child['slug'] ) {
					wp_redirect( $child['redirect_url'] );
					exit();
				}
			}
		}
	}
}