To check if your payment settings are activated correctly, log into the Stripe Dashboard and go the Settings > Payment Methods. If your desired payment options are supported for your Stripe account, you will see them under the Eligible tab:
If they aren't activated, click the "Activate" button to enable the payment method or apply for activation. WeChat Pay has an application that you need to complete, and Alipay has a separate process. Both activation flows are subject to change by Stripe.
Once you receive a successful payment with each payment method, you will see the "Live" badge next to them under the Live tab:
Alipay must be activated separately and supports one-time payments out of the box.
To enable Alipay subscription payments, you must make the request to Stripe support directly based on this article in their documentation.
After a discussion with Stripe support as of Dec 2020, they stated they plan to add a button in the dashboard and/or automate the ability to activate Alipay subscriptions on your Stripe account in the future.