WooCommerce: Count External Product Clicks

/**
 * @snippet       External Product Button Click Counter
 * @how-to        Get CustomizeWoo.com FREE
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 7
 * @community     https://businessbloomer.com/club/
 */

add_action( 'woocommerce_external_add_to_cart', 'bblomer_new_external_add_to_cart', 1 );

function bblomer_new_external_add_to_cart() {
	remove_action( 'woocommerce_external_add_to_cart', 'woocommerce_external_add_to_cart', 30 );
	add_action( 'woocommerce_external_add_to_cart', 'bbloomer_external_add_to_cart', 30 );
}

function bbloomer_external_add_to_cart() {
	global $product;
	if ( ! $product->add_to_cart_url() ) return;
	echo '<p><a href="' . $product->add_to_cart_url() . '" class="single_add_to_cart_button button alt countable" data-pid="' . $product->get_id() . '">' . $product->single_add_to_cart_text() . '</a></p>';
	wc_enqueue_js( "
		$('a.countable').click(function(e){
			e.preventDefault();
			$.post( '" . '/wp-admin/admin-ajax.php' . "', { action: 'increment_counter', pid: $(this).data('pid') } );
			window.open($(this).attr('href'));
		});
	" );
}

add_action( 'wp_ajax_increment_counter', 'bbloomer_increment_counter' );
add_action( 'wp_ajax_nopriv_increment_counter', 'bbloomer_increment_counter' );

function bbloomer_increment_counter() {
	$pid = $_POST['pid'];
	$clicks = get_post_meta( $pid, '_click_counter', true ) ? (int) get_post_meta( $pid, '_click_counter', true ) + 1 : 1;
	update_post_meta( $pid, '_click_counter', $clicks );
	wp_die();
}

add_filter( 'manage_edit-product_columns', 'bbloomer_admin_products_views_column', 9999 );

function bbloomer_admin_products_views_column( $columns ){
   $columns['clicks'] = 'Clicks';
   return $columns;
}

add_action( 'manage_product_posts_custom_column', 'bbloomer_admin_products_views_column_content', 9999, 2 );

function bbloomer_admin_products_views_column_content( $column, $product_id ){
	if ( $column == 'clicks' ) {
		echo get_post_meta( $product_id, '_click_counter', true );
    }
}