Adding Apple gift cards to wallet or Apple Card
Trying to add apple gift cards to wallet
iPhone 14 Pro Max, iOS 17
Gift Cards are redeemed in your Apple Account. They are used for purchases only, so you cannot transfer the balance to an Apple Cash card. For instructions on redeeming the Gift card:
How to redeem your Apple Gift Card or App Store & iTunes gift card - Apple Support
To view what can be purchased with your Gift Card:
What you can buy with your Apple Gift Card or Apple Account balance - Apple Support