Sorry for my bad english.
When i look into the file "default_wallet" it is a "wallet_type": "xpub"
Which is a watch-only wallet, as you referred. Electrum does not create watch-only wallet out of thin air. You must have created a wallet, exported its Master Public Key and insert that key on the new wallet you created.
If you have the seed to that wallet you can get the funds back, otherwise no, so... Do you have the seed?