This question has been asked periodically over the years, but I cannot find a definitive answer that works.
On the occasion of buying her a newer iPhone, I am transitioning my daughter to her own AppleID (which is currently in our family share).
She has various games and lifestyle apps with progress and data that was accumulated while using her previous phone (under my AppleID), and wants to transfer them.
Is there a straightforward way to do this?
(Newer phone is iOS 12, older one is stuck on iOS 10)