In a large bowl, add chicken thighs, garlic, lemongrass, fish sauce, soy sauce, dark soy sauce, brown sugar, and lime juice. Marinate for 15 mins up to overnight preferred.

Preheat air fryer to 425F (218C) for a few mins. Add chicken thighs to the basket (don’t overcrowd and cook in batches as needed) and air fry for 11-13 mins until browned and cooked through (internal temperature should be at least 165F [74C]).

While the chicken is cooking, make the dipping sauce by adding fish sauce, water, sugar, lime juice, rice wine vinegar, minced Thai chili, and minced garlic in a bowl or jar. Stir well to combine and set aside. You can store the extra sauce in an airtight container in the fridge for up to a month.

Carefully remove the chicken from the air fryer and cut into strips. Serve with rice noodles, salad, cucumber, fried eggs, and dipping sauce.