Heat Instant Pot on sauté mode and then, add oil.
While that heats up, prepare the sauce by combining in a bowl coconut aminos, rice vinegar, ketchup, garlic, and seasonings. Set aside.
In a medium bowl, coat chicken with arrowroot powder then add to heated Instant Pot. Let sear 2 minutes, flip and repeat.
Add prepared sauce and cashews, stir and cover. Pressure cook for 10 minutes then manually release pressure.
Top with sesame seeds and scallions, and serve with sides.
Store, and enjoy!