Not sure where you're located, but some places require all parties to be aware that they're being recorded and not informing (and receiving consent) other parties can be a illegal act[0] in the US.
This link[1] looks at the US and other (a not very comprehensive list) countries.
I'm emphatically not saying you shouldn't record stuff, just that there are laws and you should be aware of them.
[0] https://recordinglaw.com/united-states-recording-laws/
[1] https://www.telemessage.com/call-recording-laws-an-internati...