Preheat air fryer to 400°F.
Slice the potato into thin wedges and toss with 1 tsp avocado oil and a pinch of salt.
Air fry potatoes for 15-18 minutes until golden and tender.
In a small bowl, whisk together arrowroot, almond flour, garlic powder, and paprika.
Stir in the egg white and light beer until a smooth batter forms.
Pat the cod dry, season with salt and pepper, then dip each piece into the batter.
Lightly grease the air fryer basket with remaining oil and place the fish inside.
Air fry the fish at 375°F for 10-12 minutes until the coating is crisp and the fish flakes easily.
Steam the peas until bright green and serve alongside the fish and chips with a fresh lemon wedge.