“Nordic cuisine” is probably used because it provides better name recognition too, in addition to a wider selection.
Karelian stew and mämmi. Crispbread to go with them. That’s it.
It’s much more than that. https://fi.wikipedia.org/wiki/Suomalainen_keittiö But a lot of those aren’t internationally known or specifically associated with Finland so it doesn’t make it worth it to run a specifically Finnish cuisine focused restaurant.
I mean could be, I don’t remember. Just seemed like a weird thing to throw out there.
That is you trying to define it. Your own article links to “List of European cuisines” and that includes and links to “Finnish cuisine”. If you were trying to define cuisine through truly unique foods or preparation techniques etc, not only would you drive yourself insane but you’d also find out you wouldn’t have many cuisines left.