I got this cable, works absolutely fine: https://www.amazon.co.uk/gp/product/B08FY28Z8F/ plugged in to the front Type C 3.1 port
I found opting in to the beta channel on the oculus desktop software enabled 90hz for me when tethered via Oculus Link, doesn't make much difference, but you can just about tell if you look for it. I was expecting the linked streaming to be worse, but Steam picks it up seamlessly and there's nothing you really have to do other than enable it on the headset.
My router is a fairly old 5ghz job and doesn't seem to be the best for wireless streaming, but it worked briefly in virtual desktop. Yet to try a game. Spent more time trying to set up a wifi 6 hotspot on my PC, which I could but it never had an internet connection - guess it's something to do with VPN.
Been playing pistolwhip, beat saber, don't touch anything and Superhot on the device. Running through Obduction (Myst style game) on Steam and going to try out Alyx after that.