since those are the derivation paths tested by using "Detect Existing Accounts".
Link: github.com/spesmilo/electrum/blob/master/electrum/bip39_wallet_formats.json#L1
By using that button, you've basically tried all standard and some non-standard derivation paths at account index 0 (and above if '0' is used).
Your wallet must have its own unique Native SegWit derivation path that isn't in that list;
or the SegWit wallet that you want to restore is at the second account index while the first isn't used yet.
--update--
I've been testing the app myself and figured out the SegWit derivation path to use in iancoleman's BIP39 tool:
- Do the same steps up to the derivation path selection.
- Now, go to "BIP141" tab.
- Change the derivation path into m/1'/0
- Then the script semantics into P2WPKH