MultiCamera Macro switching based on screen detection

I have a M/E constellation hd with companion and an elgato stream deck and I’m trying to automate switching to a camera. when a new slide is put up through an input. is it possible to set it up natively through black magic or companion?

Through Companion many things are possible. You probably can’t program a scene change feedback but it would be easy to program a macro that would advance a slide and cut to a camera.

Good Luck