Mix the ground beef, crushed crackers, onion, egg, milk, 1/4 cup ketchup, garlic powder, salt, and black pepper in a large bowl until evenly combined.
Divide the mixture into four equal portions and shape each into a small loaf about 3 inches long.
Place the mini meatloaves in the air fryer basket, leaving space between them.
In a separate bowl, toss the green beans with olive oil, salt, and black pepper until coated.
Add the green beans to the air fryer around the meatloaves.
Cook at 375 degrees for 15 minutes.
Remove the basket and spread the remaining 2 tablespoons of ketchup over the top of each meatloaf.
Return the basket to the air fryer and cook for 5 more minutes until the meatloaves reach an internal temperature of 160 degrees.