Whisk ketchup, mayonnaise, mustard, and sweet relish; set aside.
Bake bacon at 400°F for 20–25 minutes until crisp, crumble, and set aside.
Peel and cube potatoes, toss with olive oil, salt, pepper, garlic powder, and paprika.
Air fry at 400°F for 20–25 minutes, shaking basket, or roast until golden.
Cook ground beef and onion with seasonings until browned, drain, stir in garlic.
Combine beef and potatoes in skillet, top with cheese and bacon, bake at 400°F until melted.
Finish with burger sauce and green onions, serve hot with extra toppings.