Is the Quest 2 connected to a groundstation with a cable or in communication with something like a windows laptop? If so, you can use Unity and OBS between the Windows PC groundstation and the Quest 2 headset.
Between the Windows PC and the THETA X, you can use gstreamer with this software running on the Jetson Nano.
Go to the bottom posts of this thread for details:
Live Streaming over USB on Ubuntu and Linux, NVIDIA Jetson
You can get 4K 30fps from the USB cable and from the plugin. If you already have a Jetson Nano in the equipment on the tower, then most people would use the Jetson for the transmission. One of the considerations is heat generation inside the THETA if the THETA is handling the WiFi transmission. If the USB cable is used, you can turn off WiFi and reduce heat.
If you’re planning to use Ethernet eventually, I would connect the THETA X to the Jetson Nano with USB.
Examples:
Feel free to post more questions. Other people have walked down similar paths. The Quest 2 headset is a bit new and we’re still trying to figure out the best approach. However, it does seem to work with OBS → virtual cam → Quest 2. Unfortunately, I personally do not have a Quest 2 to test.