This article describes how to disable or enable Safari using the Screen Time feature on your child's iPhone or iPad.
Summary: Go to Settings > Screentime and turn Safari to ON or OFF.
1. On your child's iOS device, open Settings.
2. Select Screentime > Content & Privacy Restrictions > Allowed Apps.
3. Enter your Screen Time Passcode. Depending on your iOS version, you may be required to enter your passcode in the previous step. (What if you forgot the passcode?)
4. Toggle Safari to ON or OFF.