Same issue here. We’ve enabled the new checkout experience and there is now no reference to AliPay in the WooCommerce Payment settings area (though in the Stripe dashboard on Stripe’s website AliPay is marked “enabled/active”). Customers are now asking if we’re no longer accepting AliPay, so the option seems no longer available to them. It was working before enabling the new checkout experience. Is this something that will be addressed soon with in an update?