|Add image to product gallery programmatically - woocommerce|
|Woocommerce manage field ‘_product_image_gallery’ with id of images separatly for comma.|
|$list_id = "444,555";|
I have a similar set up but only one attachment ID gets placed in the product image gallery.
$commaList = "2104,2105,2106,";
Are you sure this works to add images to the product gallery programmatically?