https://www.polygon.com/2018/2/20/17031590/doom-nintendo-switch-motion-controls

Doom’s release on the Nintendo Switch has always felt like a bit of a miracle, and that miracle became a bit easier to play with today’s patch that adds motion controls to the game.

You’ll find the ability to toggle “motion aiming” in the menu after installing the update, and it allows you to aim by moving the right Joy-Con, similar to the motion controls in Splatoon 2.