The Protect and Survive spin-off set in Finland by @DrakonFin could be interesting as a (mini?)series. My brother recently showed some episodes of Taivaan tulet, a Finnish police drama set in the icy remote town of Kemijärvi -- I could see our hypothetical adaptation being a bit similar to that.
To be honest, I have thought about the same thing. Apart from the "history book" sections, much of the story is basically in "a road movie" format, and thus you could adapt the travels of some of the characters as a series in that mold. And then again, you could also make the story of the Acting and the Mikkeli Cabinet into a sort of post-apocalyptic political drama series.