How to turn on apple cash

There several steps to add Apple Cash to your Wallet App on your iPhone. This Apple Support article has all the details,

Set up Apple Cash - Apple Support

How to set up Apple Cash

1. Open the Settings app on your iPhone or iPad.
2. Scroll down and tap Wallet & Apple Pay.
3. Turn Apple Cash on.
4. Under Payment Cards, tap Apple Cash.
5. Tap Continue, then follow the instructions on your screen.

When someone sends you money, it's automatically and securely kept on your Apple Cash card. Your new Apple Cash card can be found in the Wallet app.

Once your account is setup it’s advisable to verify your ID. This will enable larger transfers/transactions.

Identity verification for Apple Card or Apple Cash - Apple Support

Verifying your ID will help prevent you account from being locked or closed.

If your Apple Cash account is restricted or locked - Apple Support