Prep: Soak wooden skewers in water for 20–30 minutes if using, then cut chicken into chunks and mince garlic.
Thread the chicken onto skewers, leaving a bit of space between each piece.
In a small bowl, mix olive oil, garlic, onion powder, paprika, cayenne (if using), salt, and black pepper.
Brush the seasoning mixture over the skewered chicken on all sides.
In a separate bowl, stir together the mayo, sweet chili sauce, and sriracha; divide the sauce in half.
Grill, bake at 425°F, or broil the chicken skewers for 7–8 minutes on one side.
Flip the skewers and begin brushing with the cooking half of the bang bang sauce.
Continue cooking another 7–10 minutes, brushing again once or twice, until golden and fully cooked through.
Serve hot with the reserved dipping sauce, lime wedges, and fresh herbs.