My iOS app has recently passed Apple's review process and is currently in the status of "Pending Developer Release." Prior to the official release, I wanted to test the in-app purchasing feature, so I issued a promo code shortly after the app was approved. Through this promo code, I downloaded my app, but unfortunately ran into an issue. When I attempted an in-app purchase, the screen remained in a "loading" state. This issue was not present in my TestFlight version, where the iOS payment sheet typically displayed promptly.
I'm uncertain whether this could be an issue with my code, or if there is a certain waiting period required after approval before the in-app purchase functionality can be tested, even with the app downloaded via a promotion code.
With these concerns, I'm feeling quite apprehensive about making my app public. I would greatly appreciate if someone could provide some insight or guidance on testing in-app purchases in the actual production environment before public release. Any feedback from you guys would be immensely valuable. 
