Prepare the sauce by mixing mayonnaise, sweet chili sauce, Sriracha, lime juice, garlic powder, and salt in a bowl.
Heat the vegetable oil in a large skillet over medium heat.
Season the chicken thighs with a pinch of salt on both sides.
Cook the chicken thighs for about 6-7 minutes per side, until golden brown and cooked through.
Remove chicken from the skillet and let it rest on a plate for a few minutes.
Add the sauce to the skillet and stir over low heat until warmed through.
Return the chicken to the skillet, tossing it gently to coat with the sauce.
Serve immediately, garnished with chopped green onions.