Jitsi Meet (in common with other WebRTC videoconferencing systems in common use) is only P2P when there are exactly 2 people in the meeting. (And even then it may need to use a server depending on the type of connectivity you have.)
P2P videoconferencing beyond a few participants isn't very practical in the real world, due to the bandwidth requirements rapidly exceeding what a typical user's connection can reliably transmit without unacceptable loss/delay/jitter.
