When I add these line items to the end of my Child Theme functions.php – I do get an empty list and the message "0 posts found" ….
<?php
add_theme_support( 'builder-3.0' );
add_theme_support( 'builder-responsive' );
add_filter('posts_orderby', 'edit_posts_orderby');
function edit_posts_orderby($orderby_statement) {
$orderby_statement = "modified DESC";
return $orderby_statement;
}