Set your air fryer to 400°F and allow it to preheat.
In a large mixing bowl, whisk together canola oil, brown sugar, garlic powder, kosher salt, and pepper.
Add the pork belly cubes to the bowl, tossing them well so each piece is coated with the seasoning mixture.
Arrange the pork belly bites evenly in a single layer inside the air fryer basket. Depending on your air fryer’s size, you might need to cook them in batches.
Cook the pork belly bites for 18 to 20 minutes, stopping occasionally to shake and flip them to ensure they crisp up on all sides.
Once cooked through and crispy, transfer the pork belly bites to a plate and serve while hot.