Metaphysics - what is it?
It's the first principles of reality which makes a structure.
You have a metaphysical structure, like foundationalism, coherentism, infinitism, monism, nihilism etc.
Then you have a means to traverse through that structure, or an ontological relationship narrative. In that you have emanationism, emergentism, successionism, Aristotle's logic etc.
Then you have ontological dimensions which is the narrative of what objects fundamentally are in number (so do you import light and darkness/wave vs particle light with dualism or just photons with monism). In that you have monism, dualism, trialism, quadrilism, etc, pluralism, nihilism etc.
From this structure one can derive their ontological framework and epistemological framework, their philosophy of history, sex, politics, writing, technology and anything else from their metaphysical structure.