Maybe the example is not the best one, but if you remove the lines from the code, where the device is disconnected, you can see the problem quickly, if you turn and rise the wrist.

Thank you for your response. The app has been submitted by Xcode 12.5.1 and currently there are no adjustments for Series 7. After contacting the App Review Board, the app has been approved for the App Store. So everything was fine with it and it's icons. This discussion can be closed.

In the App "Watch" on the iPhone, where you can remove it from the watch, the icon is fine. It is Xcode's job to bring them to the right place when archiving the App. There are a few Apps from me in the AppStore, independent and iOS/Watch Apps. The latest one is a copy from one already available, modified for another purpose. All Icons are where and how they should be. At least if I compare them to the ones of the other app. In the meantime, the app has been approved for TestFlight, so I guess, I'm right and everything is ok with the icons. Now I hope, in the next round this will be the case with the AppStore submission.