Hi, I got similar problem here.
My XR Elite didn't show my computer as an option in Computer Connection page
I am already done:
Installed and Running latest version of VIVE Streaming Hub
My computer connected to Wi-Fi router using ethernet cable
My Wi-Fi router did support 802.11ac
And my XR Elite connected to that 5Ghz Wi-Fi
but nothing shows up in Computer Connection page
p.s. my computer is able to streaming to XR Elite through USB.