I have an add problem in that there is no sound in Brave while using You Tube. Firefox is fine, Chrome is not. I’ve gone thru 3 Brave updates, a couple Manjaro updates, Brave support and it appears that the problem is somewhere in Manjaro Pulseaudio. I’ve searched the Forums and found not mention BUT someone has to have the same problem, right?
KDE: Click on the speaker icon in the panel, click Application and see if all you have to do is turn it on. Otherwise they are going to ask you provide more info as required [HowTo] Make support easier
Do you also have the issue while playing any other media in Brave?