Not OP but if you are willing to run HomeAssistant, I built a zoom integration [0] that uses web hook events from Zoom to tell HA when you are “busy”. This triggers anytime my calendar shows I’m supposed to be in a meeting, whether I am or not. But the HA Mac app also provides sensors for your mic and video so you could combine the three sources however it made sense to achieve this

[0]: https://github.com/raman325/ha-zoom-automation