I've been building out a UNNotificationServiceExtension addition to add thumbnails to my remote notifications, and it works perfectly on my test device in the development/sandbox environment.
However, I recently sent out builds to the TestFlight users, and their build seemingly completely ignores the additon of thumbnails and a few other things that the UNNotificationServiceExtension provides.
This is admittedly my first app extension target that I've added to my app. Do I have to do something specific to include it in TestFlight builds when I archive and send it out?