Dji Go 4 keep automatically show phantom 4 instead of Spark. From the 1st place, i can't scan the QR code and using wifi to connect the phone with Spark.
Sounds like you don't have the Remote Controller and you are trying to connect the phone directly to the Spark? Try connecting the phone to the Spark manually if the QR code doesn't work. Your Sparks Wifi SSID and password are in the battery compartment with the QR code and on the side of the box it came in as well.
May I know what mobile phone you are using? Also, try to uninstall and reinstall the DJI Go 4 app. If you do have spare mobile/smartphone try to check if it will show the same thing. Thank you.