It all depends on what one means by ‘right’ vs. ‘left.’ I don’t think that those labels — which I believe originate in seating conventions in peri-revolutionary France — are particularly relevant to American politics. Is free trade right-coded or left-coded? Tariffs? Drug policy?
Far right is reactionary, going back to previous systems/time. MAGA is definitely a reactionary (I.e: far right) movement, it's in the title. There is also a hierarchical component to far right movements, which MAGA didn't completely had the first time around, so it is more complex, but you can do with that definition.
Sorry, what is your point? The subject here is whether it is partisan to describe someone as having a far-right ideology, and whether that appellation is generally accurate. This term is well understood.