Heat oven to 400°F (200°C); line a large sheet with parchment or spray with cooking spray.
Toss potatoes, carrots, and onion with 2 tablespoons oil, 1 teaspoon Italian seasoning, salt, and pepper. Spread evenly on sheet.
Pat chops dry; rub both sides with remaining 1 tablespoon oil. Season with remaining Italian seasoning, garlic powder, paprika, salt, and pepper.
Nestle chops among vegetables. Bake 25-30 minutes until chops reach 145°F internally and vegetables are tender and golden.
Rest chops 5 minutes; serve with generous portions of vegetables.