Are mental conditions physical?
How about the human will?
How about consciousness?
How about love?
All words we use to describe physical people doing physical things, so yeah, I'd say that to the extent that those things
exist, they're in the physical world.
If mental things are connected to the physical, by your definition they are physical, right, and yet we have 2 different words.
2 different words, but not two antonyms. "Mental" is not the opposite of "physical." So these aren't relevant examples.
So by your inclusive definitions, metaphysical and spiritual things are physical too, just as long as any connectivity to the physical world exists.
"Metaphysical" and "physical" are antonyms. The metaphysical can't be the physical because, to the extent that "metaphysical" has any sort of definition, that definition is "something different than the physical."