Add the flour and Cajun seasoning to a shallow bowl and stir to combine.
Add the egg to a second bowl and whisk until smooth.
Add the panko, garlic powder, and paprika to a third shallow bowl and stir to combine.
Dip the zucchini slices first into the flour, then the egg, and then the panko, being careful to coat the zucchini evenly.
Arrange the zucchini in an even layer in an air fryer basket. You may have to work in batches, depending on the size of your air fryer.
Air fry at 400 degrees for 10 minutes, flipping the zucchini over halfway through. After 10 minutes, check for crispness and continue cooking for 1-2 minutes to reach your desired level of crispness.
Notes
Serve with Ranch dressing or honey mustard, for dipping.