I have been wondering about Oculus Quest 2 compatibility too.
As you said, the research brings up little as far as definitive answers.
I even found Oculus listing the Quest 2 OS as being "Oculus" instead of "Android" like the other models.
While it is stand alone and does not require a PC to run, I am pretty sure (from more research) that it does in fact use Android.
So, my best guess is that it is VR like the rest, and should be doable.
I am so tempted to get an Oculus Quest 2 just to find out (and because I am ready to explore VR development now), especially with GGMAX coming out soon.
I guess that is the only way we will know for sure. (I'll let you know whatever it is that I can get working or fail at when the time comes)