Apple Wallet
Why can’t I add Mastercard to Wallet! I’ve reached out to my bank they said there’s no problem on their end and my info is correct. I have taken all the steps I’ve seen online but nothing works. What’s happening Apple?!
Here is general guidance→If you can't add cards to Wallet to use with Apple Pay - Apple Support
Note that the card must be issued in the same country that matches your phone’s region, all of the required information must be correct. And if you are connected through VPN that can cause problems, also.