Hey there @AlexOD2321! Welcome back to the community! It seems that many iOS IAP resources aren’t up to date. Since I don’t work with mobile often, I had to do a bit of digging, but here’s a user that seems to have bridged the gap from the old documentation and some changes necessary:
The old docs:
Extra info:
(Ignore the Android tag, they go over iOS for this post and Android in another lower in the thread) If this works out for you, please let me know. I’d like to write a community tutorial for this, but currently don’t have an iOS capable device on hand.