Preheat the waffle iron.
In a large bowl, sift together the dry ingredients: flour, baking powder and soda, salt and sugar. Whisk the coconut into the sifted flour mixture.
In a medium bowl, whisk together the wet ingredients: milk, eggs, coconut oil, orange zest and juice, and vanilla.
Pour the wet ingredients into the flour mixture and whisk to combine, without over-mixing. Stir in the chia seed, if using.
Using a quarter cup measure, scoop the batter into the waffle iron and cook according to manufacturer instructions. (For full size waffles, a half cup measure might work better.)
Top the cooked waffles with sliced banana and shredded coconut, if desired.