SnapMap was never ported to the Switch due to technical limitations. Arcade mode was added in 1.0.2 and is present in 1.0.3.
Update 1.0.3 (v196608) was a major technical patch released by Panic Button and Bethesda to improve the game's performance and visual quality on Switch. While the game initially launched with some blurry textures and performance dips, this update significantly refined the experience. doom nsp update 103