Google Assistant change default domain

On the documentation for Google Assistant

it says;

Currently, the following domains are available to be used with Google Assistant, listed with their default types:

Does this mean i can force Google Assistant to see devices differently? e.g. a switch as a scene? if so how?

Little more background. If I tell google to turn off my living room it turns everything off, however it also switches the input on my TV. My TV is dumb and every input is a switch so i can keep track of the active input. So i want to expose these switches as a scene or script to Google Assistant and wondered if it’s possible?

I know I could make it work by creating a scene and expose that to Google Assistant but though i would ask to save on a bit of scripting if possable

Nevermind i’ve found a quicker way. I’ve just assigned the switches to a non existent room so Google Assistant doesn’t care about them if I tell it to turn off my Living Room