In a medium bowl, whisk together the egg whites, Greek yogurt, and vanilla extract until smooth.
Mash half of the banana and stir it into the wet mixture; slice the remaining half into rounds and set aside.
Add the protein powder, oat flour, baking powder, cinnamon, and sea salt to the bowl, stirring until just combined to keep the batter light.
Heat a non-stick skillet over medium heat and lightly coat with half of the coconut oil.
Pour the batter into the skillet to form three small pancakes, cooking for 2-3 minutes until bubbles form on the surface, then flip and cook until golden brown.
Remove the pancakes and add the remaining coconut oil to the skillet along with the reserved banana slices.
Sauté the banana slices for 1 minute per side until they are caramelized and fragrant.
Stack the pancakes on a plate, top with the caramelized bananas, and finish with a drizzle of pure maple syrup.