Slice the russet potato into 1/2-inch thick wedges and soak in a bowl of cold water for 10 minutes to remove excess starch.
Drain and pat the potato wedges completely dry with a kitchen towel, then toss with 0.5 tbsp of olive oil, sea salt, and black pepper.
Arrange the potatoes in a single layer in the air fryer basket and cook at 400°F for 15 minutes, shaking halfway through.
While potatoes cook, whisk together the remaining 0.5 tbsp of olive oil and the beer in a small bowl, then brush the mixture onto the cod fillets.
In a shallow dish, combine the panko breadcrumbs, almond flour, garlic powder, and smoked paprika.
Press the beer-brushed cod into the breadcrumb mixture, ensuring each side is thoroughly and evenly coated.
Move the potatoes to one side of the air fryer basket and place the cod on the other side, then air fry everything together at 400°F for an additional 10-12 minutes.
Serve the crispy fish and chips hot with a fresh squeeze of lemon wedge over the top.