: Fortnite is free to download and play on the Switch, with in-game purchases available for cosmetic items and the battle pass.
You have two miserable options.
If you are looking for a review of how the "full" game actually plays on the console: fortnite switch nsp full
Here are some key points regarding Fortnite on the Switch and NSP files: : Fortnite is free to download and play
This report outlines the status and implications of using a Fortnite Nintendo Switch fortnite switch nsp full
Installing and launching an NSP while connected to Nintendo’s servers is highly detectable and will likely lead to a permanent console ban