Place thawed okra in a bowl. Preheat an air fryer to 400 degrees F (200 degrees C) for 5 minutes.
Meanwhile, heat oil in a skillet over medium heat. Stir in gram flour, salt, chili powder, coriander, chaat masala, cumin, and amchoor; cook and stir until fragrant, about 2 minutes. Remove from the heat and add to okra; mix until okra is fully coated. Transfer okra to the air fryer basket.
Cook in the preheated air fryer for 5 minutes. Flip okra and continue to cook, flipping in 5-minute intervals, until cooked through and crispy, 5 to 10 more minutes.