I have noticed since later 9.x betas that sleep focus no long switches the watch to just a clock. In the past, when sleep focus is turned on, my screen would go blank and if I tapped the screen the time would appear. if I held the crown in, it would "unlock" from time display only and allow me to use my watch.
Since this has started I have posted in the feedback app starting in 10.1. Now I have to set my watch into Theater mode every night so that the screen is off and not lighting up the room.
After each new beta release I update my feedback. Any idea if anyone has seen my feedback?