Mix kale and olive oil together in a large bowl until kale is thoroughly coated. Add garlic powder, salt, onion powder, and pepper to kale and toss until leaves are evenly coated. Transfer ⅓ the kale leaves to air fryer basket. Make sure it is evenly distributed. Cook on 360°F (182°C) for 6 minutes. Shake the air fryer basket to move the leaves around. Make sure leaves are evenly distributed. Cook on 360°F (182°C) for 2 minutes more. Transfer kale chips to a baking sheet to cool without touching each other (or else they will steam and not stay crisp). Repeat steps 3 to 7 with the additional kale. Enjoy immediately or allow to cool completely. Store in an airtight container at room temperature for up to 2 days.