A:Answer Curious why you ask? I have a Quest 2 and use it quite easily with multiple routers.
The Quest 2 does support WIFI6 (so AX), which might get you a tad more stability over just regular WIFI5 (AC). I've used it fine with WIFI5 - using Quest Airlink (the built-in way to stream PC VR games to it) and via 'Virtual Desktop' (generally, my preferred way to wirelessly stream PC VR to it).
Quest doesn't support 6e specifically (the 6GHZ), nor does it need it (WIFI5 and WIFI6 are plenty good enough). I believe the Quest Pro might support 6e though. Maybe that means the Quest 3 will support 6e as well next year.