GoKawiilApple details step-by-step process for managing cards in Apple Wallet
Apple has published guidance explaining how iPhone users can add or remove debit, credit, transit and ID cards in the Wallet app using the Plus button, either by scanning a physical card or entering details manually. The guidance notes that cards must come from a participating issuer and may require extra verification from the bank before working with Apple Pay. It also clarifies that adding a card on iPhone doesn't automatically enable it on an Apple Watch, iPad or Mac—each device needs separate setup.