Peronism is a Popular Nationalist Movement.
Obviously he is neither from the left nor from the right.
Analyzing in these "European" terms the Argentine reality does not contribute.
Franco is mentioned.
Spanish Francoists and anti-Francoists participated in Peronism.
The so-called left-wing parties never had great popular roots. Rather, they are made up of sectors of the middle class.
They were against all popular governments and supported dictatorships. Including the worst: the National Reorganization Process from 1976 to 1983.
Besides, the great majority that is said to be on the left is quite permeable to the cultural penetration of Imperialism.
Rather, they take that position, to be away from the people, but to be able to have a "clean conscience."