Many of the examples you have given are not "subgenres". Many of your questions kind of come from a specific worldview which doesn't actually fit most Action Fantasy stories.
Question 1 appears to imply the distinction that a time period must be relative to something happening on Earth? What "time period" are the DnD / Pathfinder universes set in. The question doesn't make sense in this context. Are they in the past, because 80% of the universe has no high technology, or set in the future because they are traveling the astral sea which is logically equivalent to space?
Question 2. Does Dune have a setting of a "western" or "eastern" culture? Difficult to tell, considering the universe has hundreds of populated worlds.
Question 3. Romance? If the story is a romance, then it is in the romance genre. If it contains "romances", as most stories do, then that doesn't really indicate a story's subgenre.
Question 4 just names 3 large genres of fiction with no additional context.
Question 5 is the only question so far actually asking about a subgenre of the story.
Question 6 seems to come from a viewpoint that all fictional stories occur in an alternate Earth, and that anything that isn't on Earth is automatically fairy tale. The rebels dying in the star wars universe sees their fictional universe as very real to them. So it isn't really a "folk tale".
Question 7. Drama, psychological horror, or mysteries aren't "sub genres" of fiction either. This is just question 4 with 3 new examples.
For example @skylisette your story's "subgenre" appears to be, based on its synopsis, is an emotional supernatural reluctant partner buddy cop story in a dark military urban fantasy setting with dungeon crawl elements.
Your subgenres would be "military fantasy", "buddy copy", "urban fantasy", "psychic supernatural", and "dungeon crawler".
Anyway...
Keygemin: Allegiance is a historical sky fantasy set in a world that is not Earth. The world contains 20 major factions which each have allegories to cultures in our own world. It is a hero journey type story in a military urban-fantasy setting. In the context of the world of Una, it is historical fact and depicts real events. There is some dramatic moments, but I wouldn't really call it a "drama".
tl;dr - Keygemin is a sky pirate monster trainer urban fantasy with gempunk magitech and flintlock elements.