It only works for imported wallets so you can't get the private keys of your adresses with this procedure.
Thanks BitCryptex. It was easy
Looks like my mind in the end of the day is not working good

If it wasn't an imported wallet, you just got the xpub keys of your wallet or its seed, you didn't get any "private key".
So if a wallet was created instead of imported you will be able only to restore whole wallet with seed and you cannot to extract for example private key for ETH.