Preheat your air fryer to 400°F to ensure it is hot for the potatoes.
Slice the potato into thick wedges, then toss them in a bowl with the olive oil and a pinch of sea salt.
Place the potato wedges in the air fryer basket and cook for 15-20 minutes, shaking halfway through, until golden and tender.
While the chips cook, pat the cod fillets completely dry with paper towels to ensure the batter sticks.
In a medium bowl, whisk together the brown rice flour, light beer, garlic powder, paprika, sea salt, and black pepper until a smooth batter forms.
Dip each cod fillet into the batter, allowing any excess to drip off before placing them into the air fryer.
Lower the air fryer temperature to 375°F and cook the fish for 10-12 minutes, flipping gently halfway, until the coating is crispy and the fish flakes easily.
Serve the hot beer-battered fish immediately alongside the thick-cut chips for a clean take on a classic favorite.