>>12693289There's the idea of the universal wavefunction which something along of the lines of could possibly describe physical reality
One of the problems with the question is the "everything" part of it. That's broad. I'm not aware of any mathematical link between subjective experience and phenomena and the underlying physical reality.
Some people might tell you that physical reality is all that is and that subjective experience is an illusion. However, the only thing we know for sure exists is our subjective experience.