Is communism a type of oligarchy?
Don't listen to that person other person they don't know what
they're talking about. Technically, communism is a type of monarchy
and to be specific an absolute monarchy. However
monarchy/dictatorship never truly exists because it's always a
group with one person as the visible leader. Oligarchy means "ruled
by a few" and monarchy is just a different type oligarchy.
So there are two answers to your question
1. Technically, no it's a monarchy.
2. Figuratively, it's an oligarchy but not a true oligarchy.