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.
That's where the problem lies, without your passphrase you will not be able to restore your wallet, you will lose your coins if you don't have access to your passphrase and cannot remember or brute force it.
You were more focused on your seed phrase alone neglecting that your passphrase is as important as your seed phrase in order for you to have full access to your wallet.Always write down your passphrase and keep it in a seprate place from your seed phrase.
I wish you good luck.