How to remove a child from another family sharing account?
How to remove a child from another family sharing account that isn’t mine?
iPhone 14 Pro Max, iOS 16
Question marked as
You cannot forcibly. See this article about how to move a child to another group using Family Sharing - Move a child to another group using Family Sharing - Apple Support
If this is an older child, they can voluntarily leave the other group: Leave Family Sharing - Apple Support