Preheat your air fryer to 375°F and lightly coat the basket with the avocado oil.
In a shallow bowl, whisk together the yellow cornmeal, coconut flour, baking powder, sea salt, garlic powder, and smoked paprika.
Add the liquid egg whites and 2 tablespoons of the nonfat Greek yogurt to the dry ingredients, stirring until a thick, smooth batter forms.
Pat the chicken sausages dry with a paper towel and insert a wooden skewer into the end of each link.
Dip each sausage into the cornmeal batter, using a spoon to help coat it evenly and thickly on all sides.
Place the coated sausages into the air fryer basket, ensuring they do not touch each other.
Air fry for 10 to 12 minutes, turning halfway through, until the coating is golden brown and crispy.
In a small ramekin, stir together the yellow mustard and the remaining 1 tablespoon of nonfat Greek yogurt for a creamy dipping sauce.