If you search the Diagnostic and Statistical Manual of Mental Disorders, you will see that anger is not a symptom of bipolar disorder. If you search the International Classification of Diseases manual (maintained by the World Health Organization) you will see that anger is not a symptom of bipolar disorder. It doesn’t appear to be recognized, or even proposed, that a symptom of bipolar disorder is anger.
The trouble with this seems to be that many people do experience anger, irritation and aggression as symptoms of their bipolar disorder. I am one of those people.