I think /u/cleopatra_philopater is the resident Ptolemaic Egypt expert and they seem to hate Rome's portrayal of Ptolemaic Egypt with burning passion. Not only did they write a monster post on how inaccurate and screwy it's portrayal of Cleopatra and Egypt was (seriously its long and you should read it all but there's also a tldr), but they complain about it all the time cause I've even noticed it. But it's inaccurate as F so there is that.

You should also check out these other posts by them:

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?

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?

There are more like these but I think this selection gives you the gist of what you're interested in.

I hope this helps!