Display Wordpress Home/Front Page at top of Admin Pages List

functions.php

<?php
/**
 * Plugin Name: Page List Optimizer
 * Description: Push Front Page & Posts Page & Privacy Page to top of admin list
 * Plugin URI:  https://torstenlandsiedel.de
 * Version:     1.0
 * Author:      Torsten Landsiedel
 * Author URI:  http://torstenlandsiedel.de
 * Licence:     GPL 2
 * License URI: http://opensource.org/licenses/GPL-2.0
 */
 
if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly.
}

/**
 * Push Front Page & Posts Page & Privacy Page to top of admin list
 *
 * @link https://wordpress.stackexchange.com/questions/188406/wordpress-home-front-page-display-at-top-of-admin-pages-list/279836#279836
 * @param  string   $orderby The ORDER BY clause of the query.
 * @param  WP_Query $query   The WP_Query instance (passed by reference).
 * @return string   $orderby The modified ORDER BY clause of the query with added IDs.
 */
function ezific_admin_static_pages_first( $orderby, $query ) {

	// Leave if not Admin edit Pages query.
	if ( ! ( is_admin() && $query->is_main_query() && 'page' === $query->get( 'post_type' ) ) ) {
		return $orderby;
	}

	// Leave if neither static pages are set.
	$front   = (int) get_option( 'page_on_front' );
	$posts   = (int) get_option( 'page_for_posts' );
	$privacy = (int) get_option( 'wp_page_for_privacy_policy' );
	
	$ids = implode( ',', array_filter( array( $privacy, $posts, $front ) ) );
	if ( empty( $ids ) ) {
		return $orderby;
	}

	// Update the query.
	global $wpdb;
	$orderby = 'FIELD(' . $wpdb->posts . '.ID,' . $ids . ') DESC, ' . $orderby;

	// Return the modified ORDER BY clause.
	return $orderby;
}
add_filter( 'posts_orderby', 'ezific_admin_static_pages_first', 10, 2 );