My experience with HP Support was similarly excellent.
I plugged my new Reverb G2 in and WMR wouldn’t see it.
I called support, and the tech asked me a few questions and told me a few troubleshooting steps, staying on the phone with me while I did them.
Then he asked whether I had an RTX 3090 Ti.
I replied “Yes” and he said “That’s the problem,” explaining that the Ti uses Tesla processors that make the DisplayPort signal incompatible with the G2.
I was a bit dismayed, thinking I’d need to return the headset. But he gave me an inexpensive fix: Buy a powered DP 1.4 repeater and a short DP 1.4 cable and insert them between the GPU port and the G2.
I paid $37 for the fix, and it worked like a charm.
I was impressed that the tech didn’t simply run out of things on a checklist - instead, he had the experience and knowledge to go beyond boilerplate suggestions.