I am quite sure that the S-Bounds are available throughout Europe. Perhaps not as popular, because skiers from the Nordic countries- on average- are better Nordic skiers than North Americans- and can do stuff on traditional backcountry skis- that many of us need dedicated xc
D skis for (myself included).
Open-cover Fennoscandia is windswept and hardpacked just like open country in Canada, Russia and Alaska.
Western Norway is extremely mountainous and gets a ton of snowfall (very wet- boreal rainforest climate). The evolution of the telemark stride from the diagonal stride comes from xcountry skiing in those mountains and deep snow.
The addition of sidecut to xcountry-mountain skis (i.e. "fjellski") comes from the mountainous region of Norway- not the above-tree-line alpine skiing of the Alps.
Fennoscandian backcountry Nordic skiers, IME, (to be obnoxious and generalize about an entire region of people

) are obsessive tourers. And there is one simple fact- classic long, relatively straight and relatively narrow skis (double-camber on the flats; single-camber in the mtns, and in the pow) are much more efficient touring skis than short, fat, parabolic skis.
Many skiers are unwilling to sacrifice touring efficiency for dedicated downhill performance.