Apple Wallet is available only on the iPhone and iPod touch.
Cards other than credit or debit cards are called passes.
There are several ways to add passes.

Lifewire / Ellen Lindner
Add passes to your Wallet during a transaction.
Scroll down and tapEdit Passes>Scan Code.
The QR code scanner is available only on devices with iOS 12 or iOS 11.

Wait for the scanner to start, then scan the barcode or QR code.
The pass is added to your Apple Wallet.
After adding these cards to your Wallet, using a card in a brick-and-mortar store is simple.

fire up the Wallet app.
Locate the pass you wish to use by scrolling through your Wallet.
Tap the pass to view its details, including the barcode or QR code.

When you’re in a store, the cashier scans the code from your unit.
You don’t have to carry your physical boarding pass with you.
Other passes, such as movie or concert tickets and IDs, work the same way.

Download the mobile app for the airline you use to save boarding passes to your Wallet.
see to it you do this first.
Locate your boarding pass in your Apple Wallet.

Scan your mobile boarding pass before you enter security and at the gate before you board your flight.
Swipe left and right to view your available boarding passes.
If your trip has multiple legs or flights, the Wallet keeps your boarding passes together.

Open your Wallet app and locate the pass you want to remove.
Tap the pass, then tapMore(three dots) in the upper-right corner of the screen.
TapRemove Pass>Removeto delete it from your Wallet.
Alternatively, from your Wallet’s main screen, tapEdit Passes,tap thered minusicon, and then tapDelete.
TapCredit or Debit Card.
Scan your card or enter the credit card details manually.
TapNextto verify your card information.
slide in your security code and tapNext.
TapAgreeto agree to the Terms and Conditions.
Wallet verifies your card.
Choose a verification method and tapNext.
Or, tapComplete Verification Later.
Your card is added to your Wallet.
TapUse as Default Cardor tapNot Now.