A free app and service that helps families create healthy digital habits and stay connected. It’s designed to support both online safety and real-world awareness by offering tools for screen time management, content filtering, and location sharing
Hello, thank you for reaching out to Microsoft Q&A.
According to the Microsoft article here, only the person with the Organizer role can remove members or the child account from the family group.
Reference:
How to leave a Microsoft family group
To locate the email address of the family organizer, you can open this link in a private browsing tab,
https://outlook.live.com/groups/
Sign in with your child's account.
Select the 'Members' tab.
Then, select the organizer profile to find the contact information.
You can then try recovering that email address.
Let me know if you still need more help.