I've had this issue for at least over a month now, and have had it on and off every now and then.
My quest microphone works just fine without PC usage, but when connected via link cable, it refuses to work.
I have tried repairing the software multiple times, restarting my pc, my headset, using different cables, and just re-installing a newer version of the oculus software.
None of these worked in the slightest.
At most, it finally tells me that "Your headset has no audio."
with no explanation on how to fix it at all.
I've seen others with this issue, and no answers as to how to solve this problem -- The screenshot above is what my computer tells me, and that bar never moves.
I've spent too many hours trying to fix this, if you know anything, please tell me.