Holden,
I believe that you were on to something here when you started the thread back in 2016; and I can see how I might have gone on a tangent, maybe not knowing how to proceed.
In resurrecting this line of inquiry, I wish to quote from the
Stanford Encyclopedia of Philosophy:
An alternative title for Schopenhauer’s main book, The World as Will and Representation, might well have been,
The World as Reality and Appearance. Similarly, his book might have been entitled,
The Inner and Outer Nature of Reality.