Unfortunately, if you create an Electrum seed phrase, you can only use that seed phrase with Electrum. Importantly, Electrum will allow you to restore a BIP39 wallet into it, but you have to know how.

Electrum now displays your wallet generation seed. These 12 words can be used to restore your wallet if anything happens to your computer. Make sure you write these down and keep them in a safe place.

As a result, you do not have to worry about keeping this wallet secure–you only need to worry about remembering your seed words. Open Electrum and click on File > New/Restore again.

On the one hand, Electrum forces you to retype the twelve-word seed to make sure you’ve written it down, but on the other gives you the option to enter no password at all, meaning the wallet ...

Instead of BIP39, Electrum creates wallets based on its own protocol – which no other wallet uses by default. Unfortunately, if you create an Electrum seed phrase, you can only use that seed phrase ...