may not be compatible with original Switch online play, and some users have reported DLC packs (like Pack 8) not appearing on the newer console edition without re-downloading through the official store. Are you running this on original hardware with custom firmware or on a PC emulator like Ryujinx or Yuzu?
Note: Ensure you own the original game to support the developers if you enjoy the title. one piece pirate warriors 4 nsp update dlc work