menu_page_url( string $menu_slug, bool $echo = true )

Source

File: wp-admin/includes/plugin.php

function menu_page_url( $menu_slug, $echo = true ) {
	global $_parent_pages;

	if ( isset( $_parent_pages[ $menu_slug ] ) ) {
		$parent_slug = $_parent_pages[ $menu_slug ];

		if ( $parent_slug && ! isset( $_parent_pages[ $parent_slug ] ) ) {
			$url = admin_url( add_query_arg( 'page', $menu_slug, $parent_slug ) );
		} else {
			$url = admin_url( 'admin.php?page=' . $menu_slug );
		}
	} else {
		$url = '';
	}

	$url = esc_url( $url );

	if ( $echo ) {
		echo $url;
	}

	return $url;
}