Noted. You may want to read this regarding chrome flatpak potential limitations: Clean reinstall of Chrome - #5 by Aravisian
If google meet headphone and mic are good on Brave browser, also headphone and mic are good on other apps except Chrome (flatpak) then that dispels a hardware/driver failing.
If you must have Chrome browser and want to use google meet using it, then you would be better to install as a .deb