The ancient gods of Egypt continued to be worshipped during the Roman period. There was some change to religion. The visual expressions became more Greek, whilst traditional Egyptian visual forms continued to be made.
During this period Egyptian gods were carried around the world. The “Isiac cults” or worship of the Egyptian gods (Isis, Serapis, Anubis and Horus) were popular across the Roman Empire and beyond (possibly to places like Arabia). Whilst some deities like Isis-Thermouthis were only worshipped in Egypt, others like Isis-Lactans have been found all over.
Roman authors had a sneery attitude to Traditional Egyptian Religion, but it was nevertheless popular reaching its height in the third century.