Well, it might work but where you could pick your sound server from a drop down menu button just above the recording track the latest version of Audacity doesn't show those buttons anymore.
I don't know where to look for them.
I thought it might have been to do with the change from pulse to pipewire.
Of course it might be a problem with the Audacity user interface and might have nothing to do with Solus.
But where to start looking for what I have to do?
If I want to record, let's say, a YouTube track running in the browser I just cannot find the correct options. In the past I used "pavucontrol" to set Audacity up but now?
No idea.
I think I shall look for the problem in some Audacity forum...