Having to rely on a single app to get from my seed to my keys makes me a bit nervous. So it would be nice to have an alternative.

Ian Colemans BIP39 page is very good, however it doesn't work for electrum seeds.
https://iancoleman.io/bip39/

However it seems this page can be easily modified so it does work with electrum:
https://bitcointalk.org/index.php?topic=2373020.0

However this doesn't work with Bech32 addresses - the addresses don't match the electrum wallet.

So does anybody now how to get the Bech32 addresses working?

Thanks.