You can invent a very elaborate system of pushing a request to the meet chat, having everyone consent to recording, parsing their responses, and offering feedback and help if it doesn't go as expected..

Or you can just put a disclaimer in your extension that some states require two party consent and remind the user to comply with local laws.

Fwiw, I'm on a lot of zoom calls with outside companies that have a "note taker" that is clearly a bot that records video and maybe does transcription. Most of the time it is not mentioned.