Qubes video-companion no audio from trust webcam

After successful video companion installation I cannot get the webcam microphone working. I use
Trust Tyro Webcam Full HD 1080p.

I do not have any mic in my laptop (it was removed). The mic from my headphones works okay if connected to the companion qube (receiver).
Set-up:
I have 2 app qubes based on a cloned fedora-40-xfce template. 1 is a receiver, another is a sender. Webcam is attached to the sender qube from sys-usb. Screensharing and webcam work just fine. Also direct attachment of the webcam to a dispvm works fine and provides the video and microphone from the webcam.

  1. Does qubes-video companion forward the audio from the webcam at all? If yes how to fix the problem?
  2. How to improve the video quality? streaming video quality through the firefox is just terrible, which makes the whole setup unusable…