Preheat oven to 350 degrees Fahrenheit. Line a rimmed baking sheet with parchment paper.
Add citrus slices to baking sheet in an even layer. Drizzle with maple syrup. Bake for 20 to 25 minutes, or until the citrus slices look tender and the edges have started to caramelize.
While the citrus is roasting, prepare your chocolate coconut whipped cream. Add solid coconut milk to a medium bowl. With an electric mixer, mix on medium until solids form into cream consistency. Add cocoa powder, vanilla extract, and maple syrup. Mix until combined.
Divide chocolate coconut whipped cream into four bowls. Top with roasted citrus and sprinkle with cacao nibs if desired.