Can Zoom participants not a host have a default AI note taker.

This is my first time asking a question here: At our last zoom meeting for the first time I noticed a tiny ai note taker request that had not come up before.. I asked the host if it was his, he replied it was not his, as his work computer zoom will not allow AI note taker. When I asked a participant whether it was his, he reluctantly replied that he had a default AI that came on for all his zoom meetings. Is this possible and if so why had I not seen the AI note taker request before? I am not tech savvy so I’d appreciate an answer for novices. Many thanks in advance.