Maybe, but was Cleopatra black? That is the question. If Nubian rulers were black, that was 600 years before Cleopatra.
She was Macedonian! They didn’t intermarry with local Egyptian royalty. There weren’t many if any left after the Persian conquest (Before Alexander). I’ve read that her mother was from the Seleucid royal line. Note: Another one Alexander’s generals - Seleucus who went into the king business in Syria. Might have Persian noble blood.