Panpsychism seems to posit that consciousness is a fundamental property of matter. If so, it would then need to be able to explain how discrete chunks of matter, presumably with their own consciousness, combine to create the unified sense of conscious experience that humans enjoy.
Would it not make more sense, (or are their philosophers who make this point), to think that consciousness is a fundamental aspect of reality and that the property that matter has is the ability to interface with consciousness as opposed to having its own? Such that, the more complex a system is the more access it has to consciousnesses, (and vice versa?). Roughly speaking, does it make more sense and fit with our intuitions as well as our empirical evidence to think of matter has being able to receive consciousness rather than create it?
I call this the "capacity answer" to "combination problem". Increased complexity allows for greater access to/processing of the raw conscious "stuff" that is then colored by our interaction with the physical world.