What I’m trying to do.
So, I’m trying to help people save money on a game I’m making by letting them buy a gamepass on just one game then having that gamepass transfer to another game while still having it on the other. If you know how to do this then please let me know. I will be watching lots of tutorials on how to do it.
I believe UserOwnsGamePassAsync and PromptGamePassPurchase work with GamePasses from other games.
If not then you could setup a backend application which would search for the player on the website using their UserId and check if the GamePass is a part of their inventory.