Hi Edward,

The follow article describes to process of how to put your app in the Apple store.

There is a reference and.link about TestFlight.

https://success.outsystems.com/Documentation/11/Delivering_Mobile_Apps/Generate_and_Distribute_Your_Mobile_App/Generate_and_Distribute_Your_Mobile_App_to_a_Limited_Group_of_End_Users

Regards,

Daniel