Manage alerts for a child or a device
Owners and admins choose who is told about children and devices.
A child can't change their own alerts. Owners and admins manage them instead. When you open a child's zone alerts you'll see You manage their alerts: each place notifies you, plus anyone you add.
If you open someone else's alerts and see Only they can change these, those alerts belong to that person. They change them in their own app.