Preheat. Oven to 425°F (220°C) or air fryer to 400°F (205°C). Line a sheet pan with parchment and set a wire rack on top if you have one. In the air fryer, preheat the basket and lightly spray.
Prep zucchini. Trim ends and slice the zucchini into long fry-like strips, about 1/2-inch thick. Pat dry with paper towels. If they're very watery, lightly salt and rest 10 minutes, then blot.
Set up dredging station. Bowl 1: Flour + 1/2 tsp salt + 1/4 tsp pepper. Bowl 2: Beaten eggs. Bowl 3: Panko + Parmesan + garlic powder + onion powder + paprika + remaining salt/pepper (and cayenne if using). Mix well.
Coat the fries. Work in batches. Toss zucchini in flour, shake off excess. Dip into egg, let extra drip. Press into panko mix, coating all sides. Place on rack or plate. Don't crowd.
Oil for crisp. Lightly mist the coated fries with oil spray. This is the difference between “pretty good” and “wow.”
Bake or air-fry.
Finish and season. Sprinkle with a pinch of salt as they come out. Add herbs if you want to look fancy.
Serve hot. Dunk generously in your chosen sauce. No judgment if you try three.