If you are using a standard Nintendo Switch, follow these steps to ensure you have the latest version: Automatic Update
There is no official update for Super Kirby Clash on the Nintendo Switch titled or featuring a "Deep Piece" . The game's only major software update was Ver. 1.0.1 Super Kirby Clash Switch NSP UPDATE
You will need the base game NSP and the separate Update NSP file. Why Update? If you are using a standard Nintendo Switch,
While the specific "issues" addressed were not detailed in Western patch notes, community reports and Japanese support channels indicated fixes for: Super Kirby Clash Switch NSP UPDATE