Place rolled oats, banana, milk, maple syrup, baking powder, vanilla, and salt into a blender.
Process on high speed until the texture is smooth and pourable.
Lightly grease an air-fryer-safe 8-ounce ramekin.
Pour the oat mixture into the ramekin and sprinkle chocolate chips on top.
Preheat the air fryer to 350°F (175°C).
Place the ramekin in the center of the air fryer basket.
Cook for 12 minutes or until the center is firm to the touch.
Remove carefully and let stand for 2 minutes before consuming.