en.wikipedia.org
here's a wikipedia page with 47 different definitions of fascism. i'll confess i didn't read them all thoroughly, however i can't find a single reference to the size of the government. i can, however, find a bunch of concepts that appear over and over again in these definitions, like nationalism, militarism, a populist central authoritarian anti-intellectualism, us vs them victimhood, far right extremism, and anti-democracy, which to me is where you'll find whether or not maga is a fascist movement or not.