I agree with you here, but I don't even think fascism is used interchangeably with authoritarianism. That would be a good start. Fascism has basically begun to mean "anything outside of the far left orthodoxy." People were calling Trump a fascist for his entire presidency, when the main thing that characterized his presidency was irresponsible ANTI-authoritarianism. His administration deregulated and defunded public institutions. Lowering taxes, pulling back business regulations, pulling out of climate agreements and pulling back restrictions on energy production. I'm not saying these things are good or bad, they're just explicitly anti-authoritarian, and the precise opposite of fascism. Questioning the election results were the first fascist-adjacent action taken that weren't policies shared by the left, such as trade regulations.