VST Quick Controls - Map Change Page to Controller button?

I am sure this has probably been asked.
But why is there no option to map the Pages, or even have a (Next page | Prev Page) button that’s mappable to either a controller button or knob.

This is such an easy feature to implement. And feel Steinberg will not do this, because they must get a commission on Controllers sold which officially support the Controller editor.

But, us the users, are the ones who pay for Cubase through the license fee.

This should be a standard thing to map these, it would give so much more to using the VST quick controls.