rnnoise, xiph, noise reduction
But for it to be really useful, it needs to live on my system, right? Aha! pulseeffects! But no, that does not work :/
Aha 2! NoiseTorch does! It has a funny installation instruction, but it works as advertised: extract to home, run, enable, use the noisetorch mic in applications that you want to have your voice, but not keyboard or other background noises. AAAAA++++ would use again.