Btw, when I was setting up Loops in the App Store, it suggested a default age limit of 9+ but I manually raised it to 16+ to match our backend age check.
I believe that Loops should be restricted to 16+, unless you run your own closed server, you can set the age limit in the backend to whatever you want, say if you want to run a family-only server.
We will be adding a lockdown mode to allow you to restrict all access behind login.