The body of the Distorted God Apophis retreated back to the far reaches of Duat . Duat is the home of evil beings that existed in the western continent underworld and the world of the living. It is a special realm connected to the divine realm of the Sun God Ra as he needs to visit it every night to fend off the evil beings trying to come to the mortal realm.
Ever since the body of the Distorted God Apophis got imprisoned in the divine realm of the Sun God Ra, it would always retreat back to Duat to recover its wounds and also to not be followed by the Sun God Ra or the God Seth. The western continent gods cannot cross over to Duat easily without preparation as they know that the evil beings residing there will attack them the moment they enter.