Children under 16yrs on the parents Payment should have subscriptions in the adult’s settings

Is there something I am not turning on? My 5yr old’s account was billed for Apple Arcade and he is on time limits. I had to ho and request a refund etc but, because it wasn’t listed in my subscriptions. If he is under working age(16yrs) or on my own billing account, then I should have his subscriptions listed in MY settings under subscriptions. I should be able to cancel subscriptions right from there. 🤷🏻‍♀️ Is there something I am missing?