Rinse and drain the chickpeas, then pat them completely dry with a paper towel to ensure a crispy texture.
In a food processor, pulse the chickpeas, hemp hearts, nutritional yeast, parsley, garlic, cumin, coriander, salt, and pepper until a coarse meal forms.
Shape the mixture into 6 small patties, pressing firmly so they hold their shape without falling apart.
Place the falafel in the air fryer basket and cook at 375°F for 12-15 minutes until the exterior is golden and crisp.
While the falafel cooks, whisk together the Greek yogurt, tahini, and lemon juice in a small bowl until the sauce is smooth and creamy.
Serve the warm falafel drizzled with the zesty yogurt sauce and enjoy immediately.