Unable to add Discover card to Apple wallet

Where do I even begin? I got the 16 pro a few days ago and added my cards on with no issues and was able to use it that day as well.. the next day, my discover would constantly decline every time I used it with Apple Pay, it was also happening the day after that. (I want to add that my discover works just fine once using it physically or if I input the information in manually, it just won’t work with Apple Pay). I deleted it off my phone and tried re-adding it and now it just keeps saying “contact your card issuer for more information”.

I have literally been back and forth with Discover and Apple about this issue and not a single one has been able to come up with a solution as to why this is happening and how I can fix it.

I have tried adding it in through the discover app… I’ve tried through mobile wallet… I’ve tried deleting the wallet app, redownloading it and adding it in… I’ve tried resetting my network settings…

I’m just so beyond frustrated with this and hope that someone can help me