Kieshi
Actually I'm using the Occulus Quest\Rift(?)version. software it sees the left controller, but when I open DeoVR it stops. iIt only shows the VR cursor for the right controller, or the headset.
I just tried the Meta Quest version and that actually works and sees the left controller just fine, in the controller setup screen all the buttons light up when I press on the left controller. It's the DeoVR version on Oculus Quest that I just updated and now the left controller isn't visible.
The Oculus Quest version is installed on my PC and connected to my media so I use that, the Meta Quest one so far only reads my headset memory.