What a coincidence, I'm also Finnish.

Vas. definitely has degrowth as a part of their platform, and is often speaking against eternal growth and trying to get climate laws passed. They're only one party, and the last govt's more left-leaning SD was the best partner they could have had here, but Kesk. dragged down their efforts. Of course now, with Antti Lindtman, we have a right-wing SD, I agree that they aren't very clear on policy, and are fine with sitting around waiting to win the election on the current govt's failures.

What I'm trying to say is that I don't recognize your picture of the left within Finland. Which to be clear is something like Vas. + some parts of SD (Mäkynen, Kiuru e.g.).