I can recommend some earlier answers for you on this topic:

• The Hellenic Ptolemid rulers of Egypt adopted certain native Egyptian customs and practices, how did the other Hellenistic kingdoms view that choice? Was it considered unusual or bizarre? by u/cleopatra_philopater
• Would ancient Greeks have recognized the Ptolemies as Greek, Macedonian, or Egyptian? by u/Alkibiades415
• Most people see Cleopatra as an Egyptian, but she was actually Greek. What is her real story and how did we come to the legends about her? by cleopatra_philopater
• Was Cleopatra actually Egyptian? also by our cleopatra_philopater
• It is discussed a bit in the massive post Assassin's Creed Origins is set in Ptolemaic Egypt, so now I wanna know how accurate my favourite screen adaptation of it is: HBO's Rome, again by the amazing philopater