Just because consciousness is expressed doesn't mean all expressions of consciousness are an illusion. even though we can be deluded in thinking this is all we are.
Everything has always existed because consciousness before it's expressed is in a timeless state, therefore, there is no starting or ending point of creation or expression, so yes, 2D and 3D have therefore always existed.
Also after reading your article I’m not sure of your point either are you trying to suggest, we have other realities outside of this one if so is that not a given?
It's also not a given stating that all universes and realities have their own influences, their own persona, that influences all conscious form created within these universes and realities.
I’m not clear on what it is you are trying to provide clarity on? Can you maybe condense what it is you are trying to get across?