Preheat your air fryer to 390°F (200°C) if preheating is recommended by the manufacturer.
Add the broccoli, zucchini, sweet potato, yellow squash, cauliflower, carrots, and red onions to a large mixing bowl.
Drizzle the vegetables with avocado oil or olive oil.
Sprinkle with salt, black pepper, garlic powder, and paprika.
Toss everything thoroughly until the vegetables are evenly coated.
Arrange the vegetables in a single layer in the air fryer basket. Cook in batches if necessary to avoid overcrowding.
Cook the Air Fryer Roasted Vegetables for 8–12 minutes, shaking the basket halfway through cooking.
For extra caramelization and crispy edges, cook for an additional 2 minutes.
Transfer to a serving bowl and garnish with fresh parsley, cracked black pepper, and lemon wedges before serving.