-snip-
I haven't tried myself yet, but I think it should be possible to import a wallet based on descriptors in Sparrow. You would have to convert your WIF private key to a descriptor and the open question remains, if Sparrow accepts such single private key descriptors. I wil have to check this later when I find time for it.
I have tried this before since I also though of the same workaround.
But sadly, it doesn't accept
the single-key descriptors in either new wallet settings nor "
Import Wallet->Descriptor" menu.
Importing an imported Electrum wallet file doesn't work either.