Grab the chicken thighs and sprinkle diamond crystal kosher salt all over the surface.
Then, toss the salted chicken thighs in the mayonnaise until there is a uniform thin coating of mayonnaise on the chicken. Set aside.
In a small bowl, combine the chili powder, ground cumin, garlic powder, dried oregano, and crushed red pepper or cayenne pepper (if using). Stir well to combine.
Sprinkle the taco seasoning blend on the top of the chicken until it is uniformly coated. Toss well and make sure the seasoning gets in all the nooks and crannies.
Heat an air fryer to 400°F and when it’s hot, arrange the chicken thighs in a single layer in the basket.
Air fry for about 10 to 13 minutes or until the top is browned and the thickest part of the chicken thigh is 175°F (it’s safe to eat at 165°F, but will taste best at 175° to 195°F).
While the chicken is cooking, make the mango avocado salsa. In a large bowl, combine the diced mango, avocado, red onion, cilantro, extra virgin olive oil, red pepper flakes (if using), salt, and lime juice. Taste and adjust seasoning with additional salt, pepper, or lime juice as needed.
Heat tortillas in a dry skillet for 30 seconds per side until warm and pliable. If you're keeping things grain-free or Whole30, butter lettuce leaves work great as wraps.
Dice up the cooked chicken, pile it into warm tortillas or lettuce wraps, and top with a spoonful of mango avocado salsa. Add extra lime or hot sauce if you like. Enjoy immediately!