omarliew,
I had the same issues. I had to use the beta version 24 of the Rift S, (Make sure to turn on the public feature in the Oculus settings to get it to down load it. It also required a reboot after making that change) I have the latest drivers for the 3090 as well. After that I had to go into the control settings for the keyboard and make my bindings (What keys I wanted to use for VR (Reset center, toggle toolbar, etc) then she came up fine.
You and I have the same rig setup. Same Processor, RTX3090 FE, 64GB Ram, etc.
Just be patient and work through the couple of Rift Issues. Its definitely worth it. I am running my VR settings on mostly high and am getting smooth flight.
I think you will like FS2020 in VR. I enjoy it as I use it as a tool for practicing traffic pattern work for when I fly full scale. (Only single engine cessnas)
I found this forum helped with the little issues. This thread was helpful…
https://forums.flightsimulator.com/t/read-first-vr-known-issues-workarounds/337930