This in-app-purchase does not work for me, using a self-signed ipa on a non-jailbroken iOS 13.3.
I see just the green badge across the advanced settings, they also do not respond to clicks (screenshot). I tried enabling in-app-purchases in the restrictions to see if something changes, but no success either.
Another user in this thread has reported a problem too:
Can somebody confirm that the LUTs are working for them? Jailbroken or non-jailbroken?
Or is there some kind of general patch to enable in-app-purchase-restricted functionalities on non-jailbroken phones?