Also, check the game properties in Tinfoil. A fixed NSP will show SigHash: Valid and Required FW: 16.1.0 . A broken one often shows Required FW: 0.0.0 .
To confirm you have the "proper" fixed content, check the game's title screen or the "Information" menu on the Switch home screen. It should display . If you are missing the new difficulty settings or Decor Pikmin, you are likely still running the base v1.0.0 or v1.0.1. pikmin 4 switch nsp fixed