How to add an Apple Gift Card to wallet

Apple Gift cards are redeemed into your Apple Account (formerly Apple ID) and you can add an Apple Account card to your wallet app. Please review the instructions in the Apple Support articles I linked below.

How to redeem your Apple Gift Card or App Store & iTunes gift card - Apple Support

Add Apple Account to Apple Wallet and check your Apple Account balance in Wallet on iPhone - Apple Support

What you can buy with your Apple Gift Card or Apple Account balance - Apple Support