Peel, core, and dice 1 apple into small pieces. Heat 1 tablespoon butter in a skillet over medium heat. Add the apple, 1 teaspoon cinnamon, and 1/8 teaspoon salt. Sauté for 5 to 7 minutes until the apples are tender and lightly caramelized.
In a small bowl, whisk together 1 tablespoon warm water and 1 teaspoon tapioca flour until smooth. Stir in 2 tablespoons maple syrup and 2 tablespoons milk. Pour this mixture over the apples and cook for another 2 to 3 minutes until slightly thickened. Remove from heat and set aside.
In a large bowl, whisk together 1/4 cup applesauce, 2 eggs, 1 tablespoon light olive oil, 1 tablespoon maple syrup, 1/2 teaspoon vanilla extract, and 1 teaspoon apple cider vinegar until smooth.
Add 1/2 cup oat flour, 1/2 cup almond flour, 1 teaspoon baking powder, 1/8 teaspoon baking soda, 1/2 teaspoon cinnamon, 1/4 teaspoon nutmeg, and 1/4 teaspoon salt. Whisk until a smooth batter forms. The batter should be slightly thick but still pourable.
Heat a non-stick skillet or griddle over medium-low heat and lightly grease it. Scoop about 1/4 cup batter per pancake onto the pan. Cook until the edges look set and a few bubbles form on the surface, about 1 to 2 minutes. Flip and cook the other side until golden. Repeat with the remaining batter.
In a bowl, stir together 1/4 cup Greek yogurt, 1 tablespoon maple syrup, and 1/4 teaspoon cinnamon. Gently fold in 1 cup whipped cream until smooth and fluffy.
Stack the pancakes on a plate, add a dollop of cinnamon whipped Greek yogurt, and spoon the sautéed apples over the top. Serve warm.