Preheat the air fryer to 400°F.
Combine the seasoning in a small dish.
1 tsp salt, 1 tsp brown sugar, ½ tsp smoked paprika, ½ tsp garlic powder, ½ tsp onion powder, ¼ tsp chili powder, ¼ tsp oregano, ¼ tsp pepper
Toss the steak cubes in the seasoning and olive oil.
1 tbsp olive oil, 1½ lbs steak
Place the steak in an even layer in the air fryer basket. Do this in 2 batches if needed to avoid overcrowding.
Air fry for 4-5 minutes for medium. See notes.
Serve with your favorite steak sauce.