Cut red bell pepper, orange bell pepper, red onion, and zucchini into 1-inch pieces.

In a large bowl, combine the chopped vegetables with avocado oil, garlic powder, onion powder, Italian seasoning, kosher salt, and black pepper.

Toss to coat the vegetables evenly with the seasoning and oil.

Add the chicken sausage to the bowl and mix well.

Preheat the air fryer according to the manufacturer's instructions.

Place the mixture in the air fryer basket in a single layer.

Cook at 400°F for 10 minutes, shaking the basket halfway through for even cooking.