So would the seed keys or private keys for the segwit wallet created in Electrum work on other bitcoin apps?
Like pooya87 said, electrum seed different like others.
If you Eager to trying electrum seed to another wallet, you have to read this
But you can derive the master private key itself from electrums seed (with several code snippets available on github), which then is compatible with most wallets.
And this
yes, not directly but a slightly modified BIP39 tool can derive from electrum seed mnemonic just fine
I just need to change 2 lines of code on iancoleman BIP39 tool to make it work for electrum seed mnemonic