If you are apply a Theme and enable the Dark Mode, the half of Theme is cut off. Homescreen, Lockscreen and Icons are themed, but the rest is default.
If you create a Dark Theme it should be really good, if the Dark Mode is with a Dark Theme themed too, so you can use for example Gmail or Whatsapp in Dark Mode with Theme too.
Related Menu or Feature:
Dark Mode theme too with Dark Theme and not Default Theme
Detail description of the Feature Request:
Enable Option in Theme Tool to support themed Dark Mode with Dark Theme too. And it’s possible
Beter User Experience, the user will not more worried.