My kid asked to play poppy playtime. They beat chapter one so they asked for chapter two. I bought them chapter two and three.

I like to play games as well so I created a kids account for my kid. I selected poppy playtime as a game that my kid could play but, when they are logged in, they can only play chapter 1.

Right now they are logged into my profile to play chapters two and three. When I looked up wtf is going on, on my kids profile it says I have to buy chapter two and three.

I already own those, wtf.

It may be that you have to choose what you can share with them in your account. I have family sharing on and I can choose what they are able to play from my library.