Most DLC files for the Switch version are very small (around 3 MB), as the content is already baked into the game updates and the DLC merely acts as a ticket to unlock it.
Before you hunt down an NSP or update, you need to understand what you are getting. wreckfest rom nsp update dlc switch game
It’s the full Wreckfest experience, but you’re trading 60 FPS and sharp textures for portability. Most DLC files for the Switch version are