Complications are not shown for some users

I used WidgetKit, AppIntents and AppIntentConfiguration to build some Widgets and Complications. The target version of the app is iOS 17 and WatchOS 10...

But for some Users the Complications are not shown and for other User (all on iOS 17 and WatchOS 10) everything is fine...

The Version is currently only available using TestFlight.

What can cause this problems for some users?