The selection status of the Dark/Light Mode toggle in the Control Centre needs to be more accurately stated to VoiceOver users

1. Ensure that the Dark/Light Mode toggle is enabled for display in the Control Centre.
2. Ensure that VoiceOver is enabled.
3. Load the Control Centre.
4. Place VoiceOver focus on to the Dark/Light Mode toggle.
5. Double-tap with 1 finger to switch between Dark and Light Mode.
6. Double-tap with 1 finger to switch between Dark and Light Mode.

You should find that the depending upon the current selection status of this toggle, VoiceOver will announce one of two things as you toggle the setting:

dark Switch button off Double-tap to toggle setting.
light Switch button on Double-tap to toggle setting.

This is somewhat confusing, as “dark Switch button off” and “light Switch button on” seem to be two different ways of saying the same thing - in that neither says that Dark Mode is on.