Why is there NOT an answer on this?!! I even tested giving full access and this is still blocked.
Google - why this restriction? Please fix!' Some games, like Clash Royale, will only allow you to backup (or transfer) your account with a google play games account. This is pretty nuts since Google has pushed hard for developers to integrate play games into their software. 'Family Link completely disallows the use of Google play games for the monitored account.
