There would be no holocaust.
There would be a Judenfrei Europe, but that would be because the Jews have been transported out of the Reich. The concentration camps were simply holding areas, designed to keep the Jews away from normal folk whilst their transport was being arranged, see? It wouldn’t be trumpeted, but it would be common knowledge that the Jews are gone and it would be “a good thing”. Zeitgeist would agree that removing the Jews was necessary because reasons and not much more thought than that would be given to it.
Abroad, in whatever nation that opposes the Nazis - if such a nation exists - there wouldn’t be much thought to it either, as more important issues would dominate the thinking of the nations. After all, OTL the Americans never worried about the Armenian Genocide when trying to woo Turkey in the Cold War did they?
Given that the OP is talking about a Fatherland-esque scenario, so a still powerful United States stands as a rival for Germany's global influence, I think the Holocaust will still be remembered. That said, it is questionable how much exposure it will get, even in the free world. While on paper the Holocaust is perfect anti-Nazi propaganda, I suspect the American leadership would be reluctant to rely on it too much because it rings a bit too close to the atrocity stories of the First World War. Plus the Allied response to the Holocaust was hardly exemplary, particularly around refugees. In contrast, I suspect Nazi Europe will be in full Holocaust denial mode with various measures being taken to justify it - "there weren't 6 million European Jews in the first place", "they were all recent immigrants from somewhere" etc plus the stuff the Nazis put out in OTL. I could also see the Holocaust being used as a means of discrediting American propaganda efforts. A newsreel I can imagine is somebody who looks Jewish or sufficiently left-wing is shown talking about the more outlandish elements (to someone who has not seen incontrovertible proof of said elements) of the Holocaust (like the ovens and the depraved medical experiments) while images of the result of Allied bombing and Soviet atrocities are inter-spaced. So in short the Holocaust would be remembered but would equally be reduced to a political football for at least as long as the Nazi regime lasts due to the Cold War.
teg