Select Bake on the air fryer and preheat to 300°F / 149°C.
In a small bowl, mix together the graham cracker crumbs, granulated sugar and melted butter. Press into an even layer on the bottom of two 6-ounce ramekins.
In a large mixing bowl using either a hand-held mixer or stand mixer, beat together the cream cheese, sugar and vanilla until smooth and creamy, about 1-2 minutes. Scrape down the sides of the bowl and add in the egg yolk, mixing until fully incorporated.
Divide the batter evenly between the two ramekins and smooth out the top.
Once the air fryer is preheated, place both ramekins in the fry basket and bake for 20 minutes, or until tops are firm to the touch with a slight jiggle.
Carefully remove with tongs or oven mitts and allow to cool completely uncovered then refrigerate at least 2 hours or overnight. When ready to serve, top with apple pie filling and enjoy!