Set up Screen Time for family members
You can set up Screen Time for family members through Family Sharing. Screen Time lets individual family members see how they’re using their devices and use that information to set allowances and limits for app use.
You can invite family members to join and enter their Apple IDs in Family Sharing on your device to begin the process. Or you can set up Screen Time for them in Family Sharing on your device. (For information on creating a child account for Family Sharing, see the Apple Support article Family Sharing and Apple ID for your child.)
Go to Settings > [your name] > Family Sharing > Screen Time.
Tap a family member, then tap Turn on Screen Time.
Tap Continue, then follow the onscreen instructions.
Important: If you set up Screen Time for a family member through Family Sharing and you forget the family Screen Time passcode, you can reset it on your device using your device passcode, Touch ID, or Face ID.
See Set up Screen Time.