Fix the faulty audio software which prevents the mic from working in link mode.
This happens as soon as the Oculus Quest 2 software is installed with no VR headset attached or switched on.
The result can be seen in the attachment.
If uninstalled and replaced with the Rift S software, the problem disappears but cant use the Quest 2 without an upgrade.
Found a FIX TRY THIS
If you are still having issues, go to device manager, find oculus in audio devices, if it has a hazard triangle, uninstall. to reinstall open program files find oculus, then support, run the oculus-drivers application give it a few seconds you should be good to go.
I have also had some issues with the mic not working in VrChat it just seems to not be able to find it not sure if my issue is a mix of both or just on VrChats end/ most other games/ rec room ex. work fine so I'm not sure.