Preheat your oven to 350°F (175°C) to ensure even baking.
Grease a 9x5-inch loaf pan with avocado oil or line it with parchment paper.
In a large mixing bowl, whisk together the eggs, maple syrup, avocado oil, and vanilla extract until well combined.
Fold in the grated zucchini into the wet mixture until evenly distributed.
In another bowl, combine almond flour, tapioca flour, cocoa powder, baking powder, ground cinnamon (if using), and sea salt. Mix well.
Gradually add the dry ingredients to the wet mixture, folding gently with a spatula until just combined.
Fold in the chocolate chips, reserving a few to sprinkle on top of the batter.
Pour the batter into the prepared loaf pan and smooth the top. Sprinkle additional chocolate chips on top if desired.
Place the pan in the preheated oven and bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean.
Once baked, cool the bread in the pan for about 10 minutes, then transfer to a wire rack to cool completely before slicing.