The plus sign doesn’t work on the app to add the card

You have asked us to guess the type of card "a card" might be.

• A boarding pass, ticket, other pass, etc. is added using the directions specified in the article linked above.
• A payment card is added using the plus sign at the top of the Wallet app.

Do you meet all requirements shown at the top of this article? Are you in a supported country or region?

Set up Apple Pay - Apple Support