You shouldn't need to invoke consciousness to discuss physics. It's ultimately an attempt to describe reproducible observation using mathematical objects and co

You shouldn't need to invoke consciousness to discuss physics. It's ultimately an attempt to describe reproducible observation using mathematical objects and concepts that are sufficiently commonsense that they can be communicated to fellow physicists and agreed upon. You can still ask if there are other methods that convey understanding about reality than this method, but it's not in the purview of physics. With respect to Many-Worlds, it is better understood as a formal problem. It stands in opposition to a formulation of quantum mechanics that cannot be used to model the universe as a system because what constitutes measurement was not described by that formulation, but measurements affected the system.