Preheat your air fryer to 350°F for 3–5 minutes.
Cut each biscuit into quarters and roll into balls using your hands.
Spray the air fryer basket with nonstick cooking spray.
Place dough balls in the basket in a single layer without overcrowding.
Air fry for 5–6 minutes or until golden brown, shaking the basket halfway through.
Meanwhile, mix cinnamon and sugar in a small bowl.
When donut holes are done, dip them in melted butter and roll them in cinnamon sugar.
Serve warm and enjoy!