Quote from: nodc3 on August 01, 2025, 02:24:02 AM

There is a chance it was generated outside electrum. But I think I settled for electrum seed frase. I even could modify derivation path (very low probability). But I somehow restored it easily.

It's easy to confirm this.

During seed restoration process, pay attention to the message below the seed phrase:

With "BIP39 seed" option unticked, it should show the "Seed Type" of the reserve number of your seed phrase if it's an Electrum seed.
If there's no message and the next button is grayed-out, it's not a valid Electrum seed.
With "BIP39 seed" option ticked, it should detect any error in the seed phrase if it's not a valid BIP39 seed,
Otherwise, there shouldn't be any error message displayed for valid BIP39 seed.

If it's neither of the case, then it's not a BIP39 nor Electrum seed phrase.
Is the arrangement of the words in your written backup correct?

Quote from: nodc3 on August 01, 2025, 02:24:02 AM

I remember I was clicking (*)Native segwit or smth in Electrum.

Regardless of the origin of the seed phrase, when those script type options are displayed, it means that you've ticked "BIP39 seed".

Additionally, you pretty much tested all standard, common and erroneous derivation paths already via 'Detect Existing Accounts' button.
Here's the list BTW so you wont retry those that the detect feature already tested:
github.com/spesmilo/electrum/blob/master/electrum/bip39_wallet_formats.json