I use Audacity to record and cut audio.
However it (as of version 3.2.4) does not allow editing a project while an other project is recording.
The simple solution I found is to start an other audacity instance, but with different XDG_DATA_HOME
environment.
Run eg. XDG_DATA_HOME=~/.local/share/2 audacity
to get a (somewhat) separate instance.
It may prompt you to "restore" a not properly closed project, but it's probably the one which is opened by the other instance currently.
Just ignore it.