In a bowl, toss the steak pieces with olive oil.
In a separate bowl, mix brown sugar, salt, black pepper, chili powder, garlic powder, and onion powder.
Coat the steak evenly with the seasoning mixture.
Preheat the air fryer to 400°F (200°C) for 5 minutes.
Place the steak bites in the air fryer basket in a single layer.
Cook for 4–6 minutes, depending on your preferred doneness.
While cooking, melt the butter and mix in garlic powder, red pepper flakes, and parsley.
Remove the steak from the air fryer and toss immediately in the garlic butter.
Serve hot and enjoy your Air Fryer Steak Bites.