To anyone reading this in the future and struggling - there's no obvious way to solve this. It is (yet another) bug in App Store Connect. We had another app that was rejected after first submission, but after resubmitting iAPs changed to "Approved" and worked. But not for this one though. Had to submit a ticket to support, in the end they manually pushed iAPs and subscription to "In review", and after that they were approved. It was done without resubmitting another binary.

Same here. In-apps created after they rolled out the new iAP interface and pricing upgrades don't work. They show the price fetched from the ID, but return This item is not available in the logs. How hard it is to make Crappstoreconnect work correctly? P.S. Has anyone released an app update with these iAPs to production? Do they work in live environment?

Same issue for in-app events media as well. Come oooon.