Preheat air fryer at 190° for 3 minutes.
Whisk together egg substitute and almond milk in a small bowl.
Combine almond flour and flaxseed in a separate shallow dish.
Dip avocado fries in egg substitute mixture.
Coat in almond flour mixture to coat.
Place half of avocado fries in ungreased air fryer basket.
Cook for 5 minutes, then transfer to a large serving plate.
Repeat cooking with remaining avocado fries.