Preheat the air fryer to 370°F.
Use a clean kitchen towel to pat dry the zucchini and set aside.
In a small bowl, whisk the egg. In a medium bowl, combine the panko, almond flour, Parmesan, salt, and several grinds of pepper.
Dip the zucchini slices into the egg and then into the panko mixture. Place on a plate as you work and then drizzle the slices with olive oil. Place in a single layer in the air fryer and air fry for 11 to 13 minutes, or until crisp and golden brown.
Serve immediately (they’ll become less crispy as they sit) with marinara for dipping, if desired.