Light off Apple Watch while sleeping
The best way to make sure your Apple Watch does not light up while you’re sleeping.
1- control center on your watch
2- click on theater mode, that’s the two faces side by side, icon
3- this will prevent your Apple Watch from lighting up while you’re sleeping and keep it in dark mode, even if you have “always on” set up.
Hope this helps anyone who wants to know
Apple Watch Ultra 2