I'm sure this isn't a new thing, but there's a lot more talk about what Fascism is among "Anti-Fascists" or others who oppose Fascism than avowed Fascists explaining what Fascism is.
This is a strange Assymstry, you can easily find Socialists describing Socialism. And self-described Liberals* describing Liberalism, albeit through my unscientific method of searching YouTube the names of all three ideologies I found three different results.
Fascists: No Fascists
Socialists: Primarily Socialists describing socialism, some Conservatives and Liberals
Liberalism: Mix of Socialists, Liberals and Conservatives.
The only Fascist literature I could think that describes what Fascism is of off-hand Is Mein Kampf and Mussolini's Doctrines of Fascism. From other perspectives, there's been decades of research to study Fascism. Wikipedia has an entire article dedicated to different definitions. Orwell wrote an essay during WW2 to describe how everyone is a Fascist if you don't like them.
But this is all the study of an ideology from the outside perspective. There's very few Fascist intellectuals writing what Fascism is. And very few who would call themselves Fascism. Fascist is functionally used as an insult. Nowhere is this as evident as when Democrats call Republicans Fascists and Anti-Fascists being described as "The real Fascists."
I think we are making a mistake in focusing on Fascism at all. You can find various powers which called themselves Fascism, but had little in common beyond extreme authoritarianism, which is an aspect of many regimes, not just Fascist ones.
If you want to define a term, one way of doing it is to take a variety of things and then categorise them. And then work out how to include what you want and exclude what you don't. How do you define Fascism without including the USSR and Communist China? They're all authoritarian, they all had concentration camps, they are all genocidal regimes. But we think of Communism as being fundamentally different.
Where do the South American regimes fit in? Is Pinochet [Chilean Dictator] a Fascist? Is a military Junta Fascist? What if they call themselves Socialist? Is a racist socialist a Fascist?
*I'm referring to people who follow the ideas of philosophers like Locke and Mill here, not the left-half of American politics.