Ask the seller. They started shipping oled chips with hwfly-nx firmware instead of the official one several months ago, if you ordered recently it's probably got latest 0.7.1 flashed before it got shipped.
Or just download the firmware and flash it yourself to be sure. Connect the chip to computer and run the bat file, won't take you longer than 5 minutes.
https://github.com/hwfly-nx/firmware/releases