‘On the Roadmap’ is essentially a canned response you are correct. In this instance it means it is in their plans to have it released this year. I can verify that it is not currently in testing. Also when I said on the roadmap, it was their response given to me. The roadmap on the forum is a bit different as it contains things users have submitted.
The Roadmap post you linked to is for grouping different devices in the app, for instance a room full of different devices and giving it the name of that room. This is being worked on also by a different team.
There is probably a general wishlist request for web portal improvements which would contain the ask for changing camera order.
Found it, looks like second item on the list