Lot of great answers in the thread already, but two examples that spring to mind:

The Altered Carbon (Richard Morgan) series (books 1,2 & 3) is dystopian sci-fi and features POC main characters. It's trashy but highly enjoyable

Borne (Jeff Vandermeer) is post-apocalyptic sci-fi and features female POC protagonist.

Agree that there's under-representation, but it's changing for the better