According to a post on MacRumors, there is an interesting new feature for ios14/watchOS 7 that is probably very useful for the coming watchOS 7 sleep feature.
https://www.macrumors.com/2020/06/23/ios-14-notification-apple-watch-charged/
https://www.macrumors.com/2020/06/23/ios-14-notification-apple-watch-charged/
