Wash, peel, and cube the sweet potatoes, making sure to dice them in even ½ inch cubes.
Add the sweet potatoes to a large bowl and toss with the olive oil, salt, pepper, and garlic powder, until all sweet potatoes are evenly coated.
Preheat the air fryer for 5 minutes at 400F.
Cook:
Transfer the cubed sweet potatoes inside the hot air fryer basket, spreading them out into a single layer.
Airfry the cubed sweet potatoes at 400F for a total of 12 minutes, opening the air fryer after 8 minutes to shake the sweet potatoes around. Cook them for an additional minute or two until the middle of the thickest/largest piece of cubed sweet potato is soft.
Total cooking time will range between 10 to 14 minutes depending on the size of the cubed sweet potatoes.