I would be interested to know what definition of fascism you are using that includes the USSR and North Korea. Fascism is not the same thing as authoritarianism, if that’s the definition you’re going by.
A significant number of scholars agree that a “fascist regime” is foremost an authoritarian form of government; however, the general academic consensus also holds that not all authoritarian regimes are fascist, and more distinguishing traits are required for a regime to be characterized as such.[2][3]
I would be interested to know what definition of fascism you are using that includes the USSR and North Korea. Fascism is not the same thing as authoritarianism, if that’s the definition you’re going by.
https://en.wikipedia.org/wiki/Definitions_of_fascism