[Public] GSC Redirections 404 products to best-selling category

functions.php

<?php
/**
 * Redirect product 404 page to /best-selling/ page
 *
 * @package chuyendev
 * @author codetot
 * @since 0.0.1
 **/
add_action('template_redirect', function() {
	if ( is_404() ) {
		global $wp;
		$current_url = home_url($wp->request);
		
		if ( strpos($current_url, '/product/') !== false ) {
			wp_safe_redirect( home_url('/best-selling/') );
			exit;
		}
	}
});