Add the oil to the pressure cooker and then add the chicken. Brown the chicken on all sides.If the bottom of the instant pot collects fond (baked on bits,) deglaze the bottom of the pot by adding a tiny amount of water.
Place all the ingredients for the sauce EXCEPT the xanthan gum in a jar with a lid and shake to combine.Pour over the chicken. Cover the electric pressure cooker and set the valve to “sealing.”