In a bowl, whisk together olive oil, minced ginger, minced garlic, soy sauce, rice vinegar, sesame oil, smoked paprika, honey, and hoisin sauce to make the marinade.
Divide the marinade evenly between two bowls; add the cut chicken to one bowl and the broccoli florets and sliced onion to the other, stirring each to coat.
Preheat the air fryer to 380°F (about 193°C).
Place only the marinated chicken in a single layer in the air fryer basket and cook at 380°F for 10 minutes.
Add the marinated broccoli and sliced onion to the basket with the partially cooked chicken, toss to combine, then air fry for an additional 8–11 minutes or until the chicken reaches 165°F and vegetables are tender-crisp, stirring or shaking halfway through.
Season with salt and pepper to taste and serve hot with white or brown rice if desired.