So just to clear the air, there is a tiny, tiny bit of non-Greek heritage if you squint. But it’s mainly Greek and then more Greek.

True on that (though the Sogdians are considered Iranian or at least proto-Iranian given it's actually a blanket term for any of the many ethnic and culture groups around the former Persian Empire and especially on the Iranian Peninsula). Overall though yeah it's similar to a white person claiming some form of minority ancestry because they're 1/16th something or other.

Cleopatra can either be seen as the first one with enough respect for her subjects to learn the language, or the first one desperate enough to try.

Honestly I think that is the most interesting aspect of discussion on Cleopatra and whether or not her and the Ptolemy Dynasty constitute cultural appropriation.