... Most phone carriers also offer even more control (at the cellular level).
With Content & Privacy Restrictions in Screen Time, you can block or limit specific apps and features on your child's device. You can also restrict the settings on your iPhone, iPad, or iPod touch for explicit content, purchases and downloads, and privacy.
https://support.apple.com/en-us/HT201304[https://support.apple.com/en-us/HT201304#]