The subtext here seems to be that if the Trumpian right understood Milei, they would not idolize him.
On the contrary, I believe that the Trumpian right understands Milei just fine: they're on board with his ideologies.
Their supporters don't know or care much about economics but sure like a brash-sounding contrarian strongman leader who appeals to their insecurities. They don't mind a touch of the 'ascism since the leopard surly won't be coming for their sort of face.
Milei is the closest thing the world has gotten to Milton Friedman style politics in the last few decades and the American right now looks more like what in Britain or Canada you'd call a Red Tory, i.e. paternalistic conservatism. People like Michael Lind who try to give this an intellectual underpinning are explicit critics of libertarianism.