The Fraser Institute publishes its own economic freedom index.
https://www.fraserinstitute.org/stud...-annual-report
And here we have the same conclusion, despite the Fraser Institute not being "an extreme right wing American think tank funded by the Koch brothers".
The study uses similar, though not identical criteria and reaches similar conclusions. Again, to get back to the point: Scandinavian countries are all considered in the "most free" category. I'm not quite sure what more evidence you could want anyways, different sources point to similar conclusions about the degree of economic freedom in Scandinavia, consider you may have assumptions that are outdated or just not substantiated.