It has been stuck here. Neither OnInitialized nor OnInitializeFailed is triggered, but it can be initialized normally on iPhone iOS 18.2 and iPad 15.7. The App Store review was rejected and the iPad 18.2 device did not initialize. Upgrading Unity Purchasing to version 4.12.2 still did not solve the problem
Apple made some changes which causes issues on iOS and iPadOS 18.2.
We are currently working on fixing this and we will release an IAP 4.12.3 to fix this as soon as we can.
Update: This might be fixed in iOS / iPadOS 18.2.1, would you be able to update to that version and validate if it works? If it works, does resubmitting your application work?
If this doesn’t work, would you be able to provide your device logs where IAP fails to initialize and with an attempt to buy 1 product?