Preheat your air fryer to 400°F (200°C).
Cut the chicken breast into uniform 1-inch bite-sized pieces.
In a small bowl, whisk the egg white until slightly frothy.
In a separate shallow dish, combine the almond flour, garlic powder, onion powder, sea salt, and black pepper.
Dip each chicken piece into the egg white, then dredge in the almond flour mixture, pressing gently to adhere.
Lightly coat the air fryer basket with olive oil and arrange the chicken bites in a single layer.
Air fry for 10-12 minutes, flipping halfway through, until the coating is golden brown and the chicken is cooked through.
While the chicken cooks, steam the broccoli florets until tender-crisp.
In a small ramekin, whisk together the Dijon mustard, honey, and apple cider vinegar to create the dipping sauce.
Serve the crispy chicken bites immediately alongside the steamed broccoli and honey mustard sauce.