Hardware aside, there's no lack of game design apps on the Switch. Nintendo recently released Game Builder Garage and also have Mario Maker 2 (both are first party Nintendo games)

https://www.nintendo.com/games/detail/game-builder-garage-sw...

https://www.nintendo.com/games/detail/super-mario-maker-2-sw...

SmileBasic and RPG Maker are also on Switch.

https://www.nintendo.com/games/detail/smilebasic-4-switch/

https://www.nintendo.com/games/detail/rpg-maker-mv-switch/