In a small bowl, mix olive oil, soy sauce, sweet chili sauce, rice vinegar, garlic powder, ground ginger, and honey (if using) until well combined.
Season chicken breasts with salt and pepper and coat with the sweet chili mixture.
Place chicken in the air fryer basket and cook for 12-15 minutes, flipping halfway through until the internal temperature reaches 165°F (74°C).
While the chicken cooks, season halved Brussels sprouts with olive oil, salt, and pepper. Add them to the air fryer after flipping the chicken and cook for an additional 8-10 minutes until crispy.