The pico 4 has just been released and it looks like an affordable headset with good specs (similar to Quest 2). Before this week I was only able to test Unoffensible on the Valve Index. I tried to setup all other headsets in Unity in a similar way in the hope that it would just work.
The pico 4 is the first time I tested this workflow, and I was pleasantly surprised the pico 4 worked right out of the box.
All buttons are mapped to the right inputs, and the tracking is mostly correct (maybe I'll change the angle of the controllers a little bit in the game... the Index knuckles give a nicer experience at this time).
I don't think this type of game lends itself for standalone headsets, maybe with the next XR2+++ chip... or other more powerful chips become available. So streaming quality is definitely something I will keep my eye on during development.
So if you have the pico 4, you can join the playtest and be sure it will work as expected. Here is a short video of my experience: