Well Prince Harry actually admitted that it was his choice to wear the costume as he said that “it was a poor choice of costume" and he apologises for wearing the costume just like Dominic Perrottet did.
https://www.abc.net.au/news/2023-01-14/politics-behind-nsw-premier-dominic-perrottet-nazi-costume-spat/101853538 (The story the Labor Party supporters use).
https://7news.com.au/entertainment/royal-family/prince-harry-claims-william-and-kate-told-him-to-wear-nazi-uniform-c-9364199 (Prince Harry Wearing a Nazi Costume).
https://www.9news.com.au/national/dominic-perrottet-nazi-costume-nsw-premier-apologises/0d28122c-71bd-4731-ba80-fca4bf79fcbf (The apology Dominic Perrottet made)
