Preheat an air fryer to 400 degrees F (200 degrees C). Grease the air fryer basket with cooking spray.
Combine cabbage slaw, jalapeño pepper, lime juice, olive oil, vinegar, salt, black pepper, and cayenne pepper in a large bowl. Mix until evenly combined and set aside.
Mix together flour, cornmeal, and taco seasoning in a medium bowl until well combined. Add cod and toss until evenly coated; discard any excess seasoning mixture. Place coated cod in the prepared air fryer basket and mist lightly with cooking spray.
Cook in the preheated air fryer for 5 minutes. Shake the basket and continue cooking until fish is crispy and flakes easily with a fork, about 5 minutes more. Remove to a paper towel-lined plate to drain.
Place cabbage slaw mixture into the air fryer basket.
Cook in the air fryer until cabbage is caramelized, about 8 minutes, stirring halfway.
Spoon cabbage slaw evenly onto tortillas and top with fish.