How to apply Boolean Property of a component into its variants

Try creating a new property, call it “disabled” then type “True” or “False” for the value.

Then clique the dropdown of the property and add “True” or " False" depending on what you’ve added first.

Now you have a true/false property, Figma will autmaticaly consider that a switch.

Add the property to your variant adn try it.

It seems like boolean are only there to hide layers.

If you want your boolean to hide layer go to “layer” and click the thing that look like a square and add your boolean

Basics to create Boolean - On/Off in a component

Create component  >  Go and select LAYER that you want On/Off  >  (In right side panel) Within “APPEARANCE” section click the Hexagonal Icon  >  Use the “+” sign in the modal to create NEW PROPERTY