Exists but causes physics bugs (jumps, hat throws). Not recommended for full playthrough.
Adding DLC expands the game significantly, with the physical version often including a code for the first expansion. GamingTrend a hat in time switch nsp update dlc better
Disclaimer: This blog post discusses the technical improvements of the software updates. Always support the developers by purchasing the game and official DLC from the Nintendo eShop. Exists but causes physics bugs (jumps, hat throws)