I'm surprised FrP haven't got a populist splinter. They always struck me as too ... middle-class to play the Swedish Democrats/Folkspartei game that well.
Acually they have 2 splinter groups, the Liberals People's Party ( hardline right-libertarians, not the old Venstre spin off) and the Norwegian Democrats (welfare-chauvanists), but they are both basically hyper niche failures.
Also, Progress can afford to coherently be pro-free market, privatised, low tax globalised capitalism AND pro-welfare & high public service quality, because thanks to the huge oil money surplus they do not have to choose between these goals.