Preheat your air fryer to 360 degrees F for 3-5 minutes. Preheating ensures that the zucchini cooks evenly and gets a crispy texture. Wash the zucchini thoroughly and cut them into evenly sized sticks or rounds. Aim for a thickness of about ¼ to ½ inch slices for even cooking.
Pour flour (3 tbsp) into a plastic bag and put zucchini there. Tie the ends of the bag and shake gently a few times.
Each piece of zucchini will be evenly coated with flour. Beat an egg into another bowl. Add flour, milk, salt, and also paprika, and mix everything thoroughly with a whisk. If you see that the batter is too liquid, add more flour; if too thick, pour in a little milk.
Roll the floured zucchini circles in the thick dough on both sides. In another bowl, pour breadcrumbs and roll each circle of zucchini in breadcrumbs so they are completely covered.
Place the zucchini pieces in the air fryer basket, set the air fryer temperature to 360 degrees F, and set the cooking time for 12-15 minutes, flipping halfway during the cooking process.
Serve with your favorite dipping sauce.