Preheat the oven to 400°F and line a large rimmed baking sheet with parchment paper.
Rinse the chickpeas and pat them thoroughly dry with a clean kitchen towel to ensure they roast to a crisp texture.
Cut the chicken breast into bite-sized cubes and chop the bell peppers and zucchini into similar sizes.
Place the chicken, chickpeas, bell peppers, and zucchini into a large mixing bowl.
Drizzle the olive oil over the mixture and sprinkle with garlic powder, smoked paprika, sea salt, and black pepper.
Toss the ingredients well until every piece is evenly coated with the oil and aromatic spice blend.
Spread the medley in a single layer on the prepared baking sheet, ensuring the pieces are not overcrowded.
Roast for 20 to 25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are golden.