I’ve recommended it before on another media thread, but All Our Worlds is a great book database for finding diverse literature.
Of recent books I’ve read:
The Red Threads of Fortune by J. Y. Yang: Bi/pan protagonist, nonbinary love interest, some really awesome world building and a magic system. It says it’s the second in the series, but is actually a novella that came out as a pair. (I’m currently reading it, so I’ll update if anything changes my opinion on it.)
River of Teeth by Sarah Gailey: Gay protagonist, nonbinary love interest, genderfluid secondary character. A novella about hippo ranching in Louisiana, which was something I did not know was almost a real thing until I read this book. Has a sequel novella, haven’t read it yet.
The Long Way to a Small Angry, Planet by Becky Chambers: I yell about this book every time there’s an appropriate book thread and will continue to do some. A sci-fi adventure about the crew heading out to open a wormhole into new territory. The sequel is really lovely too.
Always Human: A finished webcomic about love and finding your way. Also handles disabilities really well.
Friends at the Table: Friends at the Table is an actual play podcast about critical worldbuilding, smart characterization, and fun interaction between good friends. There’s a great thread on the forums, here is and a flowchart on where to start, but basically it’s a great tabletop RPG with great settings and characters.