I think supernatural is a word particular to western metaphysics and lexicon, that I'm not sure applies to much Eastern religious thought. I think the Tao, Brahman, Qi, or Li are thought of as part of the natural harmonious properties of the universe.Yes, so much is out of our perception. Thank goodness some of us can admit that without invoking the supernatural.
Myth is something else, since it is a literary genre.
It's quite possible, even almost certain, there are realities of the universe beyond the cognitive abilities of our chimpanzee brains to grasp, and always will be. I don't know if we have a word for that, but some people might call it transcendental.