Electrum does not generate bip39 seed phrases. So, you can only recover your electrum seed phrase using electrum.
I think I started to remember smth. I could generate an electrum seed fraze. Then when restoring selected Bip39 "to check compatibility", ignoring "bip39 checksum failed". Electrum allowes that. (I didn't know it altered adresses). Then probably changed smth in derivation path.
The question is how do I check all derivation paths, knowing seed and 2 adresses.