Preheat a Belgian waffle maker according to the manufacturer's instructions.
Brew and prepare the coffee to your liking.
In a large bowl, whisk together the flour, protein powder, baking powder, salt, and cinnamon.
In a separate bowl, whisk together the eggs, milk, vanilla extract, and maple syrup.
Pour the wet ingredients into the dry ingredients and stir just until combined. Do not overmix; a few small lumps are fine.
Lightly grease the waffle iron with nonstick cooking spray.
Pour about ¼ cup - ⅓ cup of batter into the waffle maker and cook until golden brown and crisp, about 4–6 minutes. Repeat with the remaining batter.
In a bowl whip the yogurt, vanilla and maple syrup until smooth.
Top the waffles with whipped yogurt cream, mixed fruit, and maple syrup. Serve with coffee.