I was hunting for something exactly like this last month. Got sick of the same old body positivity tropes that felt like a PSA, you know? I needed the actual heat alongside the character genuinely wrestling with loving herself. One that really stood out was 'Get a Life, Chloe Brown' by Talia Hibbert. It's not marketed as 'plus size' first, which I liked. The heroine's chronic pain and curvy body are just parts of her life, not the whole plot. Her journey with Red, the super-hot handyman, involves trusting someone to see all of her, flaws and sharp edges included. The passion scenes are seriously steamy because they're built on that growing trust and her taking charge of her own happiness.
Another I'd throw in is 'The Intimacy Experiment' by Rosie Danan. The female lead is a former adult film star with a fuller figure, and the book digs into her relationship with her own sexuality as a public thing versus something private and meaningful. It's less about 'learning to love my body' and more about integrating her bold, unapologetic sexual identity with a desire for a deeper, romantic connection. The tension with the morally upright rabbi she's paired with is off the charts, and the spicy moments feel earned because they're about vulnerability, not just attraction.