I think you don't need to care about how many user like Dark Mode. You should care about which mode suits your app's content.
PhongLe6893
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
Yes, it's possible. The content can display in Windows, 3D Volume, and Spaces.
Apple was remain in this page: VisionOS