Please review the information in the Apple Support article I linked below.
Add money to Apple Cash - Apple Support
- On your iPhone, open the Wallet app, tap your Apple Cash card, tap the More button
, then tap Add Money.
- iPad: Open the Settings app, tap Wallet & Apple Pay, tap your Apple Cash card, then tap Add Money.
- Apple Watch: Open the Wallet app, tap your Apple Cash card, tap Card Balance, then tap Add Money.
- Apple Vision Pro: Open the Settings app, tap Wallet & Apple Pay, tap your Apple Cash card, then tap Add Money.
- Enter an amount. The minimum is $10.
- Tap Add.
- Authenticate with Face ID, Touch ID, Optic ID, or your passcode.
- Face ID: Double-click the side button, then glance at your iPhone or iPad to approve.
- Touch ID: Lightly place your finger on the Touch ID sensor to approve.
The sensor is either in the Home button or—on iPad Air (4th generation) and later and iPad mini (6th generation)—the top button.
- Passcode: Enter your passcode to approve.
- Optic ID: Double-click the top button, then look at the Optic ID icon to approve.
Add money to Apple Cash - Apple Support