I guess you could discuss that in the VR Games sub-forum. I'm not sure about Steam but submitting stuff for the Oculus Store looks pretty straightforward. There are plenty of details here:
It's basically just a case of making sure your game isn't a pile of old pants, has a steady 90fps (or 45fps with ASW) framerate and that you've submitted the right sized images for the game's place on the store front.
As far as I'm aware for Steam all you need to do is register with them as a developer once you have something remotely playable and you won't have to pay their $99 one-off fee to begin submitting games for curation. You don't even have to go through the Greenlight process. Going by the amount of shite that's on Steam for VR you don't even need your game/experience/app to be any good to have it placed in the Steam Store lol
There are plenty of developers in this community so I'm sure if you post about this in the VR Games sub-forum people more qualified than me will be able to answer any questions you have about the process. I've started work on a VR game (Nakamura's Pride) but don't have a clue what I'm doing, I'm kind of stumbling around with the help of Google and YouTube at the moment lmfao