This is a pretty fucked up way of working. People can't get anything useful done if there is a mob of people on a zoom call. It's just a talkfest or more likely an opportunity for 1-2 people to dominate the conversation while the other folks tune out.
Even pair programming is a ridiculous waste of time a lot of the time, but this 'mob programming' seems to multiply the waste while achieving nothing much more useful than pairing. At least with pairing, the two people involved are building a relationship.