Preheat oven to 400°F and line a large baking sheet with parchment paper.
Dice the chicken breast into bite-sized pieces and slice the bell peppers and zucchini into uniform strips.
In a large mixing bowl, combine the chicken, chickpeas, bell peppers, and zucchini.
Drizzle with olive oil and sprinkle with garlic powder, smoked paprika, sea salt, and black pepper, tossing well to coat every piece.
Spread the mixture in a single layer on the prepared baking sheet to ensure even roasting.
Roast for 20-25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are slightly crisp.
Remove from the oven and drizzle with fresh lemon juice before serving warm.