iOS - Ads & IAP not working after Unity Cloud Build

Hi everyone, I tried compiling our game for both Android and iOS: the Unity Ads (no mediation) and IAP work on Android (deployed on Google Play) but not on iOS (on App Store via Testflight, and the Review Team won’t accept the game due to these services not working). I am using Unity 6000.3.3f1.

The IAPs are all set up in App Store, used to have a status “Ready for review” and now that they were declined they have an “Action required” status. I have accepted the App Store “paid app agreement”. “IAP Catalog” is also set up in Unity with all of the IAPs from App Store added, two check buttons (Automatically initialize …) checked, Apple SKU is set to our bundle id (com.Fruxel.CountryballsEvolution) and Apple Team ID is also set up.

Ads also do not get executed. It feels like something maybe blocks the app from accessing the internet? Not sure though, it is just a suggestion - I have no access to XCode due to not having a Mac and build via Unity Cloud Build for iOS, so it’s really hard to debug it.

Any help is appreciated!