Sparrow Wallet only asks for a passphrase twice once you've done that it should not ask again for the passphrase.
It would have been a good thing for some users because if you enter the wrong passphrase, the wallet will open with the keys of the wrong passphrase, but annoying for me because I did not requested for the extra security.
If you didn't add this passphrase you might accidentally add a passphrase during importing/generating the BIP39 seed on Sparrow take note that space(whitespaces) is considered a character and you might accidentally tap the space bar on your keyboard.
If I'm right then you can re-import your seed backup and leave the passphrase empty make sure no extra spaces on that box and then just add a password after you apply.