Hi @blunderism,
I wasn't 100% sure of how Family Sharing works so I looked up on Apple's help center and there's a feature called Ask to buy:
If you use Family Sharing, you can let your child initiate purchases with Ask to Buy.
The iTunes Service is only available for individuals aged 13 years or older or children under 13 who have received an Apple ID through the Apple ID for Students program. If your child is under the age of 13 and isn't an educational Apple ID holder, Apple must close and delete all information associated with their account.
Is it the feature you have enabled?
