Mac Mojave/Catalina blocking microphones by default
Mojave and later Mac versions often seems to block microphones without asking if the program needs permission to access the mic like it should.
Tips for how to enable microphones:
https://macpaw.com/how-to/allow-deny-microphone-access-mac
https://www.reddit.com/r/MacOS/comments/blagtd/mojave_blocking_mic_input_and_not_prompting_to/