In a large bowl, combine the rolled oats, protein powder, chia seeds, cinnamon, salt, and nuts or seeds.
Stir in the nut butter, honey (or maple syrup), vanilla, and egg white if using. Mix until everything is evenly coated. Preheat the air fryer to 320°F (160°C) for 3–5 minutes.
Line the air fryer basket with parchment paper. Add the granola in an even layer and press it down firmly with a spatula to encourage clusters.
Air fry at 320°F (160°C) for 8–10 minutes, stirring gently once around the 5-minute mark, until golden and toasty.
Remove and let cool completely without stirring so the clusters set and the granola crisps.
Once cool, break into chunks and fold in the dried fruit.
Store in an airtight container at room temperature for up to 2 weeks.