OT:
Muting your mic reportedly doesn’t stop big tech from recording your audio
https://thenextweb.com/news/muting-your-mic-doesnt-stop-big-tech-recording-your-audio

Why am I not surprised. I long suspected that video conferencing software would have this issue, especially with all the WFH employees now on Zoom or similar.

It's a feature, not a bug. Big brother is listening, and your company is likely spying on your muted utterances.