Can You Turn Off Motion Sensor On Switch?
There are a lot of third party controllers that dont have motion sensors.
If you use a controller like that, you wont need to worry about disabling motion controls.

Some games also give you the choice of traditional or motion controls when you start playing.
Some games have multiple motion control options.
Set the motion control option toOff.

Start agame modewhich supports motion controls.
Not all games give this option.
Your game will launch with motion controls disabled.

Is the Nintendo Switch Motion Controlled?
FAQ
The Joy-Cons chargefrom the main Switch battery.
Slide them onto the sides of the screen, and they’ll charge while you play.

To pair Joy-Cons with a Switch, turn the console on while they’re attached to the side.
A prompt will ask you to press one or more buttons on the controllers to sync them up.
If this doesn’t work, press thesyncbutton on the sides of the controllers.

To pair a Pro Controller, connect it to the Switch with the included USB cable.