WooCommerce: “Load More Related Products” Ajax Button @ Single Product Page

/**
 * @snippet       Related Products Load More Button
 * @how-to        Get CustomizeWoo.com FREE
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 7
 * @donate $9     https://businessbloomer.com/bloomer-armada/
 */

add_filter( 'woocommerce_product_loop_end', 'bbloomer_related_products_load_more_button' );
 
function bbloomer_related_products_load_more_button( $html ) {

   // ONLY TARGET THE RELATED PRODUCTS LOOP
	if ( wc_get_loop_prop( 'name' ) === 'related' ) {
   
      // SHOW BUTTON
		$html .= '<a class="button loadmore">Load More Related Products</a>';

      // TRIGGER AJAX 'loadmore' ACTION ON CLICK
      // AND APPEND MORE RELATED PRODUCTS 
		wc_enqueue_js( "
			var page = 2;
			var ajaxurl = '" . admin_url( 'admin-ajax.php' ) . "';
			$('body').on('click', '.loadmore', function(evt) {
				var data = {
					'action': 'loadmore',
					'page': page,
					'product_id': " . get_queried_object_id() . ",
				};
				$.post(ajaxurl, data, function(response) {
					if(response != '') {
						$('.related .products ').append(response);
						page++;
					}
				});
			});
		" );
	}
	return $html;
}

// DEFINE WHAT HAPPENS WHEN 'loadmore' ACTION TRIGGERS
add_action( 'wp_ajax_nopriv_loadmore', 'bbloomer_related_products_load_more_event' );
add_action( 'wp_ajax_loadmore', 'bbloomer_related_products_load_more_event' );

function bbloomer_related_products_load_more_event() {

   // GET PARAMETERS FROM POSTED DATA
	$paged = $_POST['page'];
	$product_id = $_POST['product_id'];

   // DEFINE USEFUL QUERY ARGS:
   // 1. CURRENT PRODUCT
	$product = wc_get_product( $product_id );

   // 2. PAGINATION AND SORTING
	$args = array(
		'posts_per_page' => 3,
		'paged' => $paged,
		'orderby' => 'id',
		'order' => 'desc',
	);

   // 3. IDS TO EXCLUDE: ON LOAD MORE, WE DONT WANT THE FIRST 3 RELATED PRODUCTS AGAIN
   // SO WE APPLY AN OFFSET TO GET THE "NEXT 3" PRODUCTS
	$exclude = array_slice( array_map( 'absint', array_values( wc_get_related_products( $product->get_id(), -1 ) ) ), 0 , $args['posts_per_page'] * ( $paged - 1 ) );

   // LETS CALCULATE AND SORT RELATED PRODUCTS
	$related_products = array_filter( array_map( 'wc_get_product', wc_get_related_products( $product->get_id(), $args['posts_per_page'], $exclude + $product->get_upsell_ids() ) ), 'wc_products_array_filter_visible' );
	$related_products = wc_products_array_orderby( $related_products, $args['orderby'], $args['order'] );

   // LETS DISPLAY THEM
	foreach ( $related_products as $related_product ) {
		$post_object = get_post( $related_product->get_id() );
		setup_postdata( $GLOBALS['post'] =& $post_object );
		wc_get_template_part( 'content', 'product' );
	}	
	wp_die();

}