Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
Slice the chicken breast into thin, long strips and place them in a large mixing bowl.
De-seed the bell pepper and slice it into thin strips; slice the zucchini into half-moons and the red onion into thin wedges.
Add the sliced vegetables to the bowl with the chicken.
Drizzle the olive oil over the chicken and vegetables, then sprinkle with garlic powder, smoked paprika, sea salt, and black pepper.
Toss everything thoroughly until the chicken and vegetables are evenly coated in the oil and spices.
Spread the mixture in a single layer across the prepared sheet pan, ensuring nothing is overcrowded to allow for proper browning.
Roast in the oven for 18 to 22 minutes, or until the chicken is fully cooked through and the vegetables are tender with charred edges.
Warm the egg white wraps slightly in a dry pan over medium heat for 30 seconds per side.
Divide the roasted chicken and vegetable mixture evenly between the two wraps, rolling them tightly to serve.