Reply To: Sending products with the “outofstock” status to the end of the list

Hello

Please add the below code to the functions.php file into the Child theme. This code shows your out-of-stock products at the end of the archive pages.

if (in_array('woocommerce/woocommerce.php', apply_filters('active_plugins', get_option('active_plugins')))) {
    add_filter('posts_clauses', 'order_by_stock_status', 2000);
}

function order_by_stock_status($posts_clauses) {
    global $wpdb;
  
    if (is_woocommerce() && (is_shop() || is_product_category() || is_product_tag())) {
	$posts_clauses['join'] .= " INNER JOIN $wpdb->postmeta istockstatus ON ($wpdb->posts.ID = istockstatus.post_id) ";
	$posts_clauses['orderby'] = " istockstatus.meta_value ASC, " . $posts_clauses['orderby'];
	$posts_clauses['where'] = " AND istockstatus.meta_key = '_stock_status' AND istockstatus.meta_value <> '' " . $posts_clauses['where'];
    }
	return $posts_clauses;
}

Best Regards