Cartesianists – There is a material-physical realm and a nonmaterial-nonphysical realm.
Computationalists* – There is one realm made of, or is identical to, or arises from informational-mathematical-computational structures.
Codicalists – There is only a material-physical realm that we have varying degrees of successful access to, or knowledge of via informational-mathematical-computational languages.
* These are “conventional” computationalists. The “natural” computationalists though think the Church-Turing thesis is wrong, and there is some sort of beyond-Turing computing afoot in human consciousness/brains.
It could be the case that a conscious devices can only be built/synthesized out of particular materials (like the particular biochemicals that make up our brain.
Quantum computing plays a role in photosynthesis. Perhaps likewise in consciousness. But you don’t need conscious brains to create “reality”. Maybe plants are enough. 🙂