Preheat the air fryer to 400°F.

Pat dry the pork belly and cut it into 1-inch pieces. (If the pork belly has thawed to room temperature, put it in the refrigerator for a few minutes to harden it up a bit for easier cutting.)

Meanwhile, in a large bowl, combine the oil, brown sugar, garlic powder, salt, and pepper.

Add the pork belly pieces to the oil mixture, covering each piece.

Lay the pork belly pieces in a single layer in the air fryer basket. (I was able to fit all of the pieces in the basket, but you may need to split them up into two or three batches, depending on the size of your air fryer.)

Air fry the pork belly cubes for 18-20 minutes, shaking and flipping them a couple of times throughout the cooking time. Please note: air frying times will depend on the size of your pork belly pieces and the size of your air fryer.

Remove from the air fryer and serve warm.