Not that I’m aware of. The camera app’s codebase is a tech preview that isn’t really going to be developed further aside of maybe some small details - we’ll very likely switch to a different codebase once we deal with the underlying infrastructure.
However, I do want to work on a Wayland protocol and its implementation in phoc that would allow applications to tell the compositor whether they should be operated in portrait or landscape, at which point it could be easily added to the camera app without having to make it support landscape mode by itself.
Personally, I just keep autorotation disabled and rotate on demand. I have never liked automatic screen rotation on any device 