In a large bowl, whisk together the oat flour, almond flour, ground flax seed, baking soda, baking powder and salt until well combined. Add the milk and banana to the bowl and stir to combine. Set the batter aside to rest for at least 10 minutes.
In the meantime, whip the aquafaba in the bowl of a stand mixer, fitted with the whisk attachment, until stiff peaks form. This will take about 5 minutes.
Fold the aquafaba into the pancake batter until combined. Let the batter rest for another 5 minutes while you preheat your skillet.
Heat coconut oil in a large skillet over medium heat. Scoop ½ cup portions of batter into the hot pan and sizzle until bubbles form on the tops of the pancakes. Flip them and cook for 1-2 minutes on the other side until entirely cooked through and golden brown.
Serve with maple syrup and enjoy!