In shallow bowl, stir together cornmeal and bread crumbs.
Season fish with taco seasoning; toss in flour until coated. Dip into beaten egg, then dredge in cornmeal mixture until well coated.
Ensure that inner pot of Instant Pot Duo Crisp + Air Fryer is dry, then place air-fryer basket in pot. In 2 batches, add fish strips to the basket; do not over-fill. Drizzle each batch with half of the olive oil.
Using the Air Fryer Lid select Air Fry at 400°F for 3 to 5 minutes or until fish is golden brown and cooked through.
Meanwhile, stir together sour cream, cilantro, canola oil, lime juice, jalapeño, garlic, salt, pepper, oregano and cumin.
Assemble fish in tortillas with shredded cabbage, chimichurri sour cream and radishes. Serve with lime wedges.