today I experienced an unexpected transaction from one of my wallets, all my assets were sold automatically, this is the first time I've experienced this, I didn't protect this wallet with a PIN and 2fa
can it be delayed after I use 2fa and PIN for all transactions?
Once the transaction is done, there is no chance to delay or cancel the transaction by applying 2FA or PIN. You should have set 2FA for your wallet in advance. It gave your wallet an extra protection. I don't think it's safe to use this wallet anymore. Better open a new wallet and set 2FA prior to use it.