I found a way to remove snap[1] and get Chromium from Debian[2]. Have a look (I have the same problem with audio in the snap version):
[1] https://github.com/cies/kubuntu-setup#remove-snap
[2] https://github.com/cies/kubuntu-setup/tree/master/chromium
First I had to research and find out how to give it microphone permissions. That worked, but the mic works for about one minute then stops.
So frustrating, I had to move meetings to Firefox which is where I do most of my work. I like to have two browsers to split the work to that which is most appropriate.