I was able to get the correct seed ( 12 words) and I have tested using ian tool for BIP39 and it works and it shows the correct addresses for Legacy but not for the segwit (bc1q)
Try and check for more than 20 addresses on iancoleman to know if you will find the address that you are looking for. You mean the wallet is not following the P2WPKH derivation path. Maybe, or maybe not. I do not know how to extract the seed phrase. I would have tested it and see if you are correct. Wait for others to comment. Hopefully other people can test that out. But I wonder the type of issue you or your friend has but not able to use the file backup directly.
The issue that we have is that we want to import that wallet on ele.. and pump the fee for a transaction.