Preheat the oven to 180C/350F and line a loaf pan with parchment paper. To a small mixing bowl, add 3 tbsp ground cinnamon and 4 tbsp granulated allulose sweetener. Mix to combine and set aside to be used for the swirl and topping.
In a large mixing bowl, add the almond flour, baking powder, and salt. Whisk together to combine. Ensure there are no lumps of almond flour left behind in the mixture.
In a separate small mixing bowl, add the eggs, melted coconut oil, 4 tbsp granulated allulose sweetener, banana extract, and vanilla extract. Use a whisk to combine everything together until a uniform mixture is formed. Then, pour the mixture into the bowl with the dry ingredients.
Use a spatula to combine the dry and wet ingredients until the mixture is of uniform consistency. If the batter appears too thick, add a splash of milk and gently mix to incorporate fully. Transfer ¾ of the amount of the batter to the loaf pan and spread evenly using a spatula.
Sprinkle ¾ of the cinnamon-sweetener mixture evenly on the batter and then add the remaining batter on top. Finally, sprinkle the remaining cinnamon-sweetener mixture.
Transfer the loaf pan to the oven and bake for 40-45 minutes until a skewer inserted in the middle of the bread comes out clean. Remove from the oven and allow the bread to cool completely in the pan.
Remove the bread from the pan and slice the loaf into 2-inch thick slices. Serve with a warm cup of tea or coffee. Store leftover bread in an airtight container at room temperature to be enjoyed later.