I have one, pretty obscure but a soft-science approach to a completely insular sci-fi situation: Molly Gloss's The Dazzle of Day. It's about Esperanto-speaking Quakers on a generation ship seeking a new homeworld, but "how do the logistics work" is kind of not the point, except the interpersonal logistics I guess.

However, sprinkled through the book are little asides, like the fact that all the cats went extinct at one point due to a new/unknown disease, and they all miss cats. They'd brought cats with them, and kept them for generations, but then they got unlucky. There isn't even an explanation of, you know, probably it was something the cats already had that wasn't that bad, that mutated and became lethal, and the cats all being interbred were in their own genetic bottleneck so might have been genetically weaker... but you can infer that if you're so inclined.