Is the Screentime API properly developed/documented?

Can you please provide the link to the demo app shown in the video? This will help the dev community looking to build useful applications more than anything else.

Is there good documentation available on error handling for FamilyControls Error?

Can you bring up FamilyActivityPicker remotely from the parent device for a specific child's iPad or iPhone?

I can only bring up a family activity picker on a child's device which means that the child can change the selection at will?

Blocking games doesn't seem to work. "Among us" in online multiplayer mode can't be blocked.