I've never used 2FA with Electrum so I'm not sure if this will work: If you can log into the wallet you may be able to recover your seed; click on "Wallet" in the Electrum toolbar, and click "Seed." It'll ask you for your password again, but it may also ask you for your 2FA code.
You would only be able to access the seed of the 2FA wallet, if you recovered it once using the seed and disabled the 2FA option.
Otherwise the whole concept would be useless.
The seed holds 2 out of 3 private keys (of a 2-of-3 multisig). Having both private keys stored in the wallet file (which basically is the case with a restored wallet with disabled 2FA) defeats the purpose of having a 2FA wallet.
When setting up a 2FA wallet, you get a mnemonic code as a backup which creates 2 out of 3 keys, then the seed and one xpriv is going to be deleted, resulting in 1 xpriv stored in the wallet.