Preheat your air fryer to 400°F (200°C).
Scrub the potato and slice into even wedges. Toss them in a bowl with the avocado oil, paprika, and half of the sea salt.
Place the potato wedges in the air fryer basket in a single layer and cook for 15-18 minutes, shaking halfway through, until crispy and tender.
While the potatoes cook, pat the cod fillet completely dry with paper towels and season with the remaining sea salt and black pepper.
In a small shallow bowl, whisk together the whole wheat flour, garlic powder, and light beer until a smooth, thick batter forms.
Dip the cod into the batter, ensuring it is fully coated, and let any excess drip off.
Lightly grease the air fryer rack. Place the battered fish in the air fryer and cook at 375°F for 10-12 minutes, flipping carefully halfway, until the crust is golden and the fish flakes easily.
Serve the fish and chips hot with a fresh squeeze of lemon over the top.