Toca Boca In App Family Sharing.
So we have Family Sharing but it looks like in app sharing doesn’t work the degree most people would expect. My wife had done all the purchases through her phone and my daughter couldn’t access these through her iPhone. What we did is my wife signed into my daughter’s iPhone. She downloaded the toca boca app and in app purchases. Once completed we signed into our daughters account and presto! This was recommended by Toca Boca as well