We have the seed phrase. is there a way to check if this is the correct one/is legit?
Create a new wallet in electrum.
Select "Wallet with two-factor authentication". After that Select "I already have a seed" and in the next window, enter your seed phrase.
If the seed phrase belongs to 2FA wallet, you will see a message saying "Seed type: 2FA".
In the next window, select "Disable". If you have imported the correct seed phrase, electrum will show the correct balance and you will be able to make transaction without any need to 2FA code.