if you have pirate games/DLC, cheats affecting the online experience or playing on EMUNAND... NO u get BAN
i have 3 years using emunand on the Sysnand and play online fortnite, smash, mario kart, etc
nintendo only ban if u use hacks, emunand and pirate games installs
i have my switch with cfw atmosphere for 2 years aprox, homebrew games and emulation works fine.