Coat the chicken drumsticks thoroughly using 1 tablespoon of olive oil. In a separate mixing bowl, combine baking powder, kosher salt, garlic powder, black pepper, and paprika to create the dry seasoning blend. Evenly toss the oiled drumsticks in the mixed spices until well coated. Brush the tops of the seasoned drumsticks with the remaining tablespoon of olive oil. Arrange the drumsticks in the air fryer basket, ensuring there is space between each piece to allow proper air circulation. Cook at 400°F for 10 minutes. Turn the drumsticks over and continue cooking for an additional 10 minutes. Once cooked through and golden brown, remove promptly and serve hot.