That makes it a tricky question because it leaves the definition of dictator up to our interpretation. However, there have been female dictators in history that were dictators with less ambiguity.
https://en.wikipedia.org/wiki/Wu_Zetian
https://en.wikipedia.org/wiki/Catherine_the_Great
https://en.wikipedia.org/wiki/Isabel_Perón
The question of communism is also largely one of interpretation. If you ask someone who sees communism in a good light, there has never been a true communist state. If you ask anyone else, there isn’t a distinction between communism and repressive dictatorship.
This can't be the standard for whether we call someone a dictator. Similarly Stalin held no government title through the 1930s. Would you say it's hard to say whether he was a dictator because he was officially just a party secretary?
Check out the three dictators I linked. That’s interesting!
I think requiring the title of dictator is not how the term is being used these days, on our side of the late Roman republic. It's more of a duck-typing situation now.
I think it's safe to assume the original comment meant it that way.
Warning: this is in my mental list of "things to good to check" so it may or may not be true.