Actually! I think Cosmic Fish is right up your alley!
-It's Fantasy themed (not the typical fantasy, more non-eurocentric folklore fantasy).
-There's a lot of hints on space but i cannot expand on this sorry
-Most of the characters are within the LGBT+ spectrum (our protagonist is Asexual, Gallo who is the chapter's companion is Bisexual, there's a trans character later on, although the majority tend to be asexual since that's my orientation.)
-I am not focusing on romance.
-There will be action scenes but I can't say action drives the plot, only when it's necessary, as it's mostly adventure.
-But definitely VERY focused on Deities or what we believe them to be.
I can also recommend Heroes of Thanthopolis which has as Ace/Aro characters, it's fantasy, and I cannot give more away but I really recommend it and it might fit your liking too!