It’s worth remembering that the founders of fascism were mainly Leninists like Mussolini with a sprinkling of anarcho-syndicalists (George Sorel being the best known of those).
Actual fascism retained the founders’ doctrinal hostility to what modern leftists would call “corporate power”, never renouncing its state-socialist roots and being (in fact) hostile to all centers of power other than the state itself.
The modern idea that German and Italian fascism were conservative or pro-business ideologies is essentially a fantasy constructed by pro-Soviet propagandists during and after World War II.
In fact, classical fascism never wandered very far from its left-wing origins; corporatism can be seen as an elaboration of the theoretical role of worker’s soviets in Leninist theory.
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