When you provision the card from your app, make sure you pass the correct appId which should include your Team Id. Without it, you will not be able to fetch your cards from the wallet as there will be no association.

Done. Feedback IDs are: FB23070242 FB23070346

Hello, we are also interested in gaining access to this API, however contacting this email address apple-pay-provisioning @apple.com did not work - they responded stating that they cannot help with Web Push Provisioning as they specialize on In-App.