The only far-right politician in Europe (and a dictator at that) is Zelenskyyy. The ones with the fake news far-right label are socialists who are against unlimited immigration.
National Rally is an anti-immigration party. AfD is an anti-immigration party.
It is specifically the growing anti-immigration sentiment that is driving these victories.
They aren’t socialist parties. They are mainly economic liberals (what liberal means in Europe) - anti-state, free enterprise, anti regulation.
In that they might as well be in the same boat as the traditional Euro conservative parties.