From today with this update you can play using oculus controllers. For the htc vive viewer I still recommend using a normal controller like the xbox 360 or one as they don't have enough buttons to cover all the inputs.
I was able to test it using the virtual desktop application and the oculus quest 2 and the experience was very good I recommend it, no need to be in front of the pc at any time :).
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 6537103 · public branch
Steam updated · First observed