Place the grated potatoes in a clean kitchen towel and squeeze out excess moisture.
In a large bowl, combine the grated potatoes, grated onion, egg, flour, salt, black pepper, and garlic powder. Mix well until fully combined.
Preheat the air fryer to 375°F (190°C) for 5 minutes.
Divide the potato mixture into 8 equal portions and shape each into a flat pancake about 1/2 inch thick.
Brush both sides of each pancake with vegetable oil to help them crisp up in the air fryer.
Place the pancakes in a single layer in the air fryer basket, making sure they do not overlap. You may need to cook in batches.
Air fry the potato pancakes for 7-8 minutes, then carefully flip them and cook for another 7-8 minutes until golden brown and crispy.
Remove the potato pancakes from the air fryer and let them cool slightly before serving.