You can try contacting Wix Customer Care as they know best about the Wix Stores functionality.
If there is no built-in option, you could also try implementing your custom payment flow:
Corvid Tutorial: Processing Payments
Corvid: About reCAPTCHA
Wishlist Page is the new official platform for requesting new features. You can vote, comment, and track the status of the requested features (requests from this page will be migrated to the new Wishlist soon).