We have been informed by a third-party subscription tracking service(Adjust) that, due to the following specification of App Store Connect, it is not possible to connect an STG app (a non-published testing app) with their server:
Specification: Since Apple’s API only allows access for apps that are already published, it is not possible to enable subscription tracking for iOS apps that are not yet published.
Could you please confirm if our understanding of this specification is correct? Additionally, is there any method or recommended approach to verify subscription tracking behavior with an STG (non-published) app before the app is released?
Thank you very much for your support.