The thing is, if you have an isolationist America, a decimated Soviet Union, all the European powers that are enemies under Nazi rule, the former colonies in disarray because of the collapse of the home government, and Japan doing its own thing in the East, then the Nazis really do have a complete and open reign in Europe. At worst, it could become like a political North Korea where the US may complain but the threat of nuclear exchange keeps it from directly interfering. Imagine a Maoist China, with Hitler Youth instead of the Red Guards, destroying centuries old landmarks and artifacts for a "new way forward", flocking to Berlin to see Hitler, reporting their parents as being counterrevolutionaries, traveling the country to indoctrinate everyone as their sacred duty, and taking on that quality of youth where they don't trust their parents or the social establishment and want to burn down the old world and forge a new one like the Red Guards or an evil inverse of the hippies, all for the man they were taught from birth was a god. If it were not in the name of such evil in and of itself, it would be deliciously ironic to see adults who supported Hitler in the 30s and 40s watch as their simple pleasures and middle class normalcy is burned away by the madness they themselves started. There are no record players with jazz music, cars, and weekend picnics in the countryside in Hitler's Germany in the long term. There is the insanity of a world burned over for some vague ideal of trucks carrying troops to no specific place through farmland while a gaudy Germania sits as the throne of power. It honestly is like a fantasy story, with the horror of what this really means when superimposed on reality, as it was in Mao's China and all the other Communist regimes in Asia. Nazi Germany does not want to be like the West, as strange as that seems because Europe embodies the West. To the Nazis, "the West" is decadence, corruption, and Judeo-Bolshevik Capitalism. The Nazis want to be a Nordic mythology.
But I am stealing away from the intended topic. I just really want to see someone write this scenario.