Preheat the air fryer to 400 degrees Fahrenheit (200 degrees Celsius).
Pat the steak cubes dry using paper towels to remove excess moisture.
In a medium bowl, combine the steak cubes, olive oil, garlic powder, onion powder, salt, pepper, and dried thyme, tossing until the meat is thoroughly coated.
Arrange the steak bites in the air fryer basket in a single, even layer without overcrowding.
Cook for 7 to 9 minutes, pausing to shake the basket at the 4-minute mark to ensure even browning.
Transfer the cooked steak to a serving bowl, drizzle with melted butter, and garnish with fresh parsley.