Preheat your air fryer to 400°F (200°C).
Cut the chicken breast into uniform bite-sized nugget pieces.
In a small shallow bowl, whisk the egg white until it becomes slightly frothy.
In another shallow dish, whisk together the almond flour, garlic powder, onion powder, smoked paprika, sea salt, and black pepper.
Dip each chicken piece into the egg white to coat, then dredge thoroughly in the almond flour seasoning mixture.
Lightly grease the air fryer basket with avocado oil and place the nuggets in a single layer, ensuring they do not touch.
Air fry for 10 to 12 minutes, flipping the nuggets halfway through the cooking time until they are golden brown and cooked through.
While the nuggets are cooking, prepare the sauce by whisking together the Greek yogurt, Dijon mustard, honey, and lemon juice in a small ramekin.
Steam the broccoli florets for 4 to 5 minutes until they reach a vibrant green and tender-crisp consistency.
Serve the hot, crispy nuggets immediately with the zesty dipping sauce and steamed broccoli on the side.