Subscription not showing in user account page

Hi community!
I’m struggling with native memberships in Webflow.
I’m creating a site that offers courses to their users.
I’ve created a membership product (paid-one time payment), linked that product to an access group, tested it with an user that -actually- paid for the membership.

But the course/product is not showing in the “User Account” page under “my subscriptions”, neither in the e-commerce tab within “subscriptions” (it reads “No subscriptions yet”)

I’m doing all this tests in the staging website (“webflow.io”)…

Am I doing something wrong?
Is it because is being tested in the staging website?

Thanks in advance for the help…


Here is my site Read-Only: [LINK]1
(how to share your site Read-Only link)