Preheat air fryer to 390 degrees F for 5 minutes. Spray inside of basket with olive oil.
Mix together oil, Worcestershire sauce, rosemary, garlic powder, salt and pepper. Brush this on both sides of meat.
Cook for 15 minutes, then pour remaining oil mixture over the top.
Lower temperature to 320 degrees F and cook for about 30 minutes. Timing will depend on thickness and how well done you want it to be.
The ideal temp taken away from the heat source in the thickest part, middle, of the roast should be 115-130F for medium rare - pink and juicy.
Remove, tent with foil and allow to rest for 10 minutes before slicing to keep it as moist as possible.
Video
Notes
How to Make the Gravy from Drippings
If you want to make gravy from the drippings, pour liquid from air fryer basket into a pot on the stove over medium high heat. Whisk 1 tbsp cornstarch with 3 tbsp cool water until smooth and once bubbling whisk this in. Continue to whisk until thickened to your liking and serve on top.