Turn off Private DNS on the Settings App
Find the instructions for your child's Android device type below.
Samsung:
Go to Settings > Connections > More connection settings > Private DNS > off.
Other Androids:
Go to Settings > Network > Advanced > Private DNS > off.
Don't want to do this?
Consider the Bark Phone™ then! Among its other tamper protections, the Bark Phone automatically locks down this Private DNS setting.