WooCommerce: Search Products By Custom Field (Backend)

/**
 * @snippet       Search by Custom Field @ WP Dashboard
 * @how-to        Get CustomizeWoo.com FREE
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 7
 * @donate $9     https://businessbloomer.com/bloomer-armada/
 */

add_filter( 'posts_where', 'bbloomer_search_products_by_custom_field_in_admin', 9999, 2 );

function bbloomer_search_products_by_custom_field_in_admin( $where, $wp_query ) {	
    global $wpdb, $pagenow;
    $post_type = 'product';
    $custom_fields = array(
        "gtin",
		  "ean",
    );
    if ( is_admin() && 'edit.php' === $pagenow && $wp_query->query['post_type'] === $post_type && isset( $_GET['s'] ) ) {
		$get_post_ids = array();
		foreach ( $custom_fields as $custom_field_name ) {
			$args = array(
				'posts_per_page' => -1,
				'post_type' => $post_type,
				'meta_query' => array(
					array(
						'key' => $custom_field_name,
						'value' => wc_clean( wp_unslash( $_GET['s'] ) ),
						'compare' => 'LIKE'
					)
				),
				'fields' => 'ids',
			);
			$posts = get_posts( $args );
			if ( ! empty( $posts ) ) {
				foreach ( $posts as $post_id ) {
					$get_post_ids[] = $post_id;
				}
			}
		}
		$search_ids = array_filter( array_unique( array_map( 'absint', $get_post_ids ) ) );
		if ( count( $search_ids ) > 0 ) {
			$where = str_replace( "wp_posts.ID IN (0)", "wp_posts.ID IN (" . implode( ',', $search_ids ) . ")", $where );
		}		
	}	
    return $where;	
}