Comment 6 for bug 1886696

@Hui
Yes, all those packages are already installed and at the latest version. I probably installed it during my attempts to fix the issue.

$ sudo apt list | egrep "alsa-ucm|libasound2|linux-firmware" | grep installed
alsa-ucm-conf/focal-updates,focal-updates,now 1.2.2-1ubuntu0.1 all [installed]
libasound2-data/focal-updates,focal-updates,now 1.2.2-2.1ubuntu1 all [installed,automatic]
libasound2-plugins/focal,now 1.2.2-1ubuntu1 amd64 [installed,automatic]
libasound2/focal-updates,now 1.2.2-2.1ubuntu1 amd64 [installed]
linux-firmware/focal-updates,focal-updates,now 1.187.1 all [installed]