Since you have the list of wallets maybe the original wallet is under your "list of wallets" so find the other wallet with the same public address and shouldn't be "a watch-only wallet".

Because like the above said there is no way to get the private key of "watch-only wallet".

If you found the original wallet which is not a watch-only wallet you can export the private key on the settings.
Or if you have a backup seed phrase you can use it to recover the wallet.