Preheat the air fryer on 350F.
Cut apples in half through the stem and use a knife or a spoon to remove the core, stem and seeds. Brush a tsp of avocado oil evenly over the cut sides of the apples, then sprinkle over ½ tsp of cinnamon.
Mix topping ingredients together in a small bowl, then spoon on top of the apple halves evenly.
Place the apple halves carefully into the air fryer basket, then cook for 15 minutes or until softened.