Well, if there's no balance under your wallet even you check them already on explorer it means that someone already transfers it to another wallet.

Honestly, I don't believe that someone could access and hack the wallet with 2fa and email which is very difficult. Unless from the start someone already monitors your device or PC that can remotely access your device or make a log of your keystroke and clipboard.

So possible the hacker has the secret key of your 2FA and have access in your email.

Why not try to scan the whole PC you currently using if you found nothing then maybe they right the problem is in your side?

Actually, I tried to recover my wallet before with the same email but it show me different wallet's so why not try to recover your wallet again using your backup it must be show different wallet from old to new. Then choose the old one and check maybe your balance is there(Worth trying.)