OK, I purchased something on Google Play on my son's tablet before setting up Family Library. I'd like to add it to Family Library so we can use it on other devices, so I set up Family Library. There seems to be no option to add the app to family library on his device, is this because he's a "supervised" account?
I can't even change his age to be above 13 through Family Link...
@jankatins I did buy it with the family credit card. I am thinking I might try to return it and buy it with my main account.
@jankatins The only problem is it's Minecraft and I think my son may have already played a bunch, not sure if he'll lose his world...