If this is a P2P exchange service, there should be privacy for users who do not wish to register and reveal their identity, and therefore it is not necessary to register email or Telegram.
According to what I saw when I tried to test their service. It's not P2P. It’s more of an instant exchange.P2p exchange means Peer to Peer exchange, and it should not involve av third party. You should just check out how Bisq operates for learning purposes
