No, Electrum uses a different (and superior) derivation scheme than BIP 39 so it's not possible to generate it on another wallet, however the Electrum source code is open so it's not possible for Electrum to completely disappear from the internet.
Also, you don't need internet access to access your private keys on Electrum, so you can always export your private keys from Electrum and import them into another wallet even if Electrum servers are shut down.