Preheat air fryer to 350°F (175°C). Grease a silicone donut mold.
Whisk together all dry ingredients in a medium bowl.
In a separate bowl, whisk eggs, milk, coconut oil (or applesauce), vanilla, and sweetener until smooth.
Pour wet into dry and stir just until combined. Do not overmix.
Spoon or pipe the batter into molds, filling each about ¾ full.
Air fry at 350°F for 8–12 minutes, until a toothpick comes out clean. Start checking at 8 minutes.
Cool 5 minutes, then gently remove from the mold.
Once fully cool, stir together glaze ingredients, dip or spread over the donuts, and add toppings.