Preheat the oven to 350°F (175°C). Grease a 9x5-inch loaf pan and line it with parchment paper, leaving some overhang for easy removal.
In a large bowl, whisk together the flour, baking powder, salt, and baking soda until evenly combined.
Add the sugar (or xylitol), canned coconut milk, and plain yogurt to the dry ingredients. Whisk gently until just combined and no large streaks of flour remain; do not overmix.
Pour the batter into the prepared loaf pan and smooth the top with a spatula. Sprinkle coconut chips on top if using.
Bake on the center rack for about 50 minutes, or until the loaf is risen and a toothpick inserted into the center comes out clean.
Allow the loaf to cool completely in the pan. Run a knife around the edges, invert onto a plate, and remove the parchment.
If desired, frost with melted coconut butter, your favorite frosting, or a simple glaze made from 1/2 cup powdered sugar mixed with 1 tablespoon milk of choice.