This is an Update file , not the full base game. It must be installed alongside the base game to function .
This update brought significant "The Wild Update" refinements and technical changes: Minecraft (NSP)(Update 1.19.40).rar
The .rar is a compressed container. Once extracted, it reveals an .NSP (Nintendo Switch Package) file, which is the standard format for digital eShop content . This is an Update file , not the full base game