Make the marinade. In a large bowl, combine the juice and zest of 2 lemons, olive oil, salt, dried oregano, and minced garlic cloves. Add the chicken thighs and toss to evenly coat. Refrigerate and marinate for 1 hour, or up to 12 hours.
Preheat the air fryer to 385°F / 195°C. Place the chicken in the air fryer skin side up and cook for 15-16 minutes, or until the skin is golden brown. Set aside.
In a large mixing bowl, toss together the potatoes, juice and zest of 1 lemon, zucchini, red onion slices, and quartered lemons.
Place in the air fryer basket and air fry at 385°F / 195°C for another 15 minutes, or until lightly golden and fragrant. Serve alongside chicken with a sprinkle of feta. Enjoy!