Problem:

+ 1 biến thể hết hàng
+ Lựa chọn option: hide out of stock product

=> Làm thế nào để add waiting list function vào cho trường hợp này?

Solution:

Plugin Woocommerce Waitlist solution:

Does this work for variable products?

There is a known issue when using WooCommerce Waitlist in conjunction with variable products that prevents the Waitlist UI from being displayed in the Edit Product screen when the ‘Out of Stock Visibility’ option is set to ON.

You would only need to do this if you were managing waitlists internally, but did not want customers to be able to join a waitlist via the front-end of your site.

The only current solution to this problem is to turn this option off: