Pat the chicken wings dry with paper towels to help them crisp up while grilling.
Place the wings in a large bowl.
Add olive oil, Cajun seasoning, paprika, garlic powder, onion powder, black pepper, salt, and chili flakes.
Toss the wings until evenly coated with the spices.
Drizzle lemon juice over the wings and mix again.
Preheat the grill to medium heat.
Place the wings on the grill in a single layer.
Grill for about 8–10 minutes on one side until lightly charred.
Flip the wings and cook another 8–10 minutes until fully cooked and crispy.
Remove from the grill and let them rest for a few minutes.
Sprinkle chopped parsley before serving.