Php 在WooCommerce上克隆订单时使用`add_product()`添加产品元数据

我正在为WooCommerce订单创建克隆功能. 我想要的是确保产品项元数据被正确克隆.

 /**
 * Get the original order items to be clone
 * Each product inside the new order must also contain the meta_data
 */
$order     = wc_get_order($post_id);
$new_order = wc_get_order($new_post_id);
foreach ($order->get_items() as $item_id => $item) {
    $product_id = $item->get_product_id();
    $quantity   = $item->get_quantity();

    // Get product's meta data values
    $_wwp_wholesale_priced = get_post_meta( $product_id, '_wwp_wholesale_priced', true);
    $_wwp_wholesale_role = get_post_meta( $product_id, '_wwp_wholesale_role', true);
    $_amount_requested = get_post_meta( $product_id, '_amount_requested', true);
    $_amount_colli = get_post_meta( $product_id, '_amount_colli', true);

    $args       = array(
      '_wwp_wholesale_priced' => $_wwp_wholesale_priced,
      '_wwp_wholesale_role'   => $_wwp_wholesale_role,
      '_amount_requested'     => $_amount_requested,
      '_amount_colli'         => $_amount_colli,              
    );

    $new_order->add_product(wc_get_product($product_id), $quantity, $args);
}

在文档中，看起来传递$args应该可以做到这一点，但我没有看到传递任何meta.我也试过使用$item->add_meta_data和$item->update_meta_data，但它们似乎不起作用.我遗漏了什么？

Goal:

Current: