Prepare the coleslaw. Add the broccoli slaw, fennel, white onion, and dill to a bowl and toss. Season with ½ teaspoon of salt and massage for 2-3 minutes.
In a separate small bowl, whisk together the rice vinegar, white wine vinegar, lemon juice, Dijon mustard, honey, ½ teaspoon salt, and pepper. Pour the dressing over the coleslaw and toss. Place in the refrigerator for later.
Preheat the air fryer to 400ºF, and if using frozen cod, be sure to thaw it.
Prepare the fish by blotting the cod with a paper towel to remove excess moisture. Cut the fish into 4 strips or pieces that will fit in your air fryer. Set aside.
Add the eggs to a mixing bowl and whisk together. In a separate bowl, mix the bread crumbs, flour, old bay seasoning, and salt. Stir to combine.
Dredge the fish filets through the egg mixture. Allow excess egg to drip from the fish. Dredge the fish through the breadcrumb mixture. Use your hands to firmly pat or press the breadcrumb mixture into the fish filet.
Dredge the fish through the egg and breadcrumb mixture a second time. Repeat until all the fish filets have been coated twice.
Coat the air fryer basket with 1 tablespoon of olive oil and then transfer the fish filets to the air fryer. Drizzle the remaining olive oil over the fish.
Cook the fish for 8 minutes and then gently flip the fish. It’s ok if the fish falls apart a little bit. Cook the fish for an additional 4 minutes or until the fish is golden brown.
Remove from the air fryer and let the fish rest for 5 minutes.
Assemble the tacos by filling each taco with fish, coleslaw, and tartar sauce.