Asking for recommendations of fiction books with a communist setting. Ideally with a “show don’t tell” narrative structure. That is, communism exists and works fine but the author does not say “this is communism”. Just existing in the background like any other normal thing.
Kim Stanley Robinson already got a mention in here, but his "Mars Trilogy" (Red Mars, Green Mars, Blue Mars) is an interesting and often depressing look into how humanity of the 1990s-2000s might've handled international joint colonization of Mars by humanity. It's still largely applicable now days, although the Russians in the book(s) were raised in the USSR.
It's hard to explain the books beyond what I wrote, I think. I'd suggest just start reading Red Mars and if you aren't hooked in the first chapter by the jaded, misanthropic-ish Frank Chalmers then you probably won't like the series.