Clean and pat the chicken thighs dry. Place them in a container.
Add the rest of the ingredients (except tzatziki sauce) to the container and mix well until everything is evenly coated.
Cover and refrigerate for at least 3 hours.
Pressure Cook
Add 1 cup of water to the cooker. Place the trivet inside.
Place the marinated chickens on the trivet. Spread the rest of the marinade over the chicken using a spoon.
Place the lid on. Pressure cook on high for 10 minutes with a 5 minute natural release. Follow the manufacture instructions for releasing the pressure. Remove lid.
Instant Pot Air-fryer lid: press the broil (400°F) button and cook for 12 minutes. Air Fryer: transfer the chicken to the air fryer basket and cook at 400°F for 10-12 minutes or until skin is crispy. Oven: transfer the chicken to a baking sheet. Broil on high for 6-10 minutes or until the skin is crispy.