Apple Cash family share merchant restrictions
Will selecting “share cash with family members only” prevent my child from making purchases at a merchant?
Question marked as
No, they can still spend Apple Cash, but they cannot send Apple Cash, using Messages, to anyone not in Apple Cash Family.
Set up and use Apple Cash Family - Apple Support
How children and teens can use Apple Cash
If your family organizer set up Apple Cash for you, you can use it to make purchases in participating stores, apps, and websites.
You can also use Apple Cash to send and receive money with people you know. If you're under 13 years old, you can't add a debit card to Wallet to use with Apple Cash.