I created a seed phrase using electrum, it was in electrum format.
Let's assume this is now confirmed and that you don't have a spelling error in your Electrum recovery words used with BIP39 option in Electrum. Can we assume it confirmed too that you didn't alter the sequence of the Electrum recovery words?
Yes, no doubt.
Today I came to some more logical conclusions about my actions that day. I did ctrl+c, ctrl+v of m/44'/0'/0'/0/0 to derivation path. Then I clicked a link to IanColeman page
https://iancoleman.io/bip39/. Checked that derivation path for BIP44 is m/44'/0'/0'/0. And since they contradicted with each other by one index, I decided that less is better, and that is when my flashback about deleting smth from derivation path actually happened. Then I thought since Electrum originally had even less zero's and I have no idea what corresponds to external and internal, I most likely decided to leave only m/44'/0'/0'. Then when restoring the wallet I was just changing h to ', and that was my second flashback. So most probably I just had to change 8 to 4, and h to ' x2.
And all that with a checkbox on "native segwit (p2wpkh)".
So
60% chance derivation path was m/44'/0'/0'
35% chance derivation path was m/44'/0'/0'/0
5% chance it was smth stupid like m/44'/0'/x', m/44'/0'/x, m/44'/0'/x'/y, m/44'/0'/x/y, where max for x is 1, max for y is 3.
Since I tried all these variations it leaves me with only one conclusion. I most likely had an extension word in my seed phrase.
It couldn't be smth I
don’t use constantly, since I didn't even document that.
Will spend my evening bruteforcing in that direction.