Man, I've been on this exact hunt for months now and it's honestly a mixed bag. You're not gonna find a one-stop shop, which is kinda frustrating but also means there's a lot out there if you're willing to dig. A huge chunk of the good stuff is on self-publishing platforms like Amazon Kindle Unlimited and Smashwords, but the trick is the search algorithms are notoriously bad for niche romance pairings. You can't just type 'bwwm' and expect everything to pop up; you gotta play with keywords like 'interracial romance,' 'black heroine,' 'white hero,' and then cross your fingers. I've found some absolute gems by following specific authors once I like one book—they tend to write within that lane.
Don't sleep on the smaller indie romance publishers, either. Some imprints are way more focused on diversity than the big houses. And honestly? Goodreads lists curated by users are a lifesaver, even though the site itself is clunky. Find one solid bwwm book with the kind of characters you like, scroll down to the 'Lists' section, and you'll fall down a rabbit hole. Discord servers dedicated to romance readers are also low-key amazing for recommendations; people share their latest finds and you get real-time opinions. It's a bit of a scavenger hunt, but that's half the fun—and the payoff when you find an author who really nails the dynamic with complex, non-stereotypical characters is worth the hassle. My Kindle library is proof.