It is possible to know if that account he sended the btc to its Metamask wallet or a exchange wallet ?
Metamask is not a bitcoin wallet. So, that's not Metamask.
Exchanges usually move the fund to their hot wallet from user's deposit address after someone makes a deposit. Since the fund has not been moved yet, I don't think the address belongs to an exchange.
It's more likely that the address belongs to the scammer's personal wallet.