Hi! I'm John, a fellow Microsoft user like you.
I understand your frustration. I'm here to help you with this. Just to check, does the issue persist even after restarting the computer? Then signing out and signing in to the Microsoft Family website after?
If issue persists, it usually means it hasn't been properly linked to the child account within the Family Safety settings. You need to ensure the child signs in with their account on the device to register it under Family Safety. If the device isn't listed, you may need to manually add it by going to Settings > Accounts > Family & other users on the device, selecting the child account, and allowing access. "Connect devices in Family Safety" https://support.microsoft.com/en-us/account-bil... and expand "Windows devices" section.
If the issue persists, please provide more details by answering my questions.
Click "Reply" below to let me know.
Regards,
John J.D.