The most famous forms of Holocaust denial and revisionism tend to focus on Jews, casting doubt, for example, on how many were exterminated in the camps. But denying the impact the Nazis had on the other groups they targeted, including queer and trans people, disabled people and Romani people, is still Holocaust denial. Maybe someone should tell J.K. Rowling.
Trans, gay, Romani, Black people all got deported to concentration camps as well as jews. The death machinery worked against a lot of people, even if it was designed to exterminate jews.
They even had a badgesystem to visually identify for what “crime” someone was in the camp.
https://en.m.wikipedia.org/wiki/Identification_of_inmates_in_Nazi_concentration_camps