I think you should send this as feedback to Apple, specifically the Apple Watch team. Sometimes even emailing the top people at Apple might be able to help. Yo

I think you should send this as feedback to Apple, specifically the Apple Watch team. Sometimes even emailing the top people at Apple might be able to help. You can also post this in the iOSprogramming subreddit. I think this should be possible using the sensors on the watch similar to how watches have the auto screen on when hand is raised.