If there are no parties mainly concerned with climate sustainability, then that is very likely because voters are not sufficiently interested in such platforms, and are more receptive to messages like "will fight immigrants", "will fight use of incorrect pronouns" or "will prevent trans-women from fighting in womens MMA".
Speaking for the US: climate sustainability (as main focus) was up for election 25 years ago, and about half the nation did not even bother voting, so it seems unsurprising to me that focus has shifted away from this issue (and fair to blame voters for that).
Speaking for the US: climate sustainability (as main focus) was up for election 25 years ago, and about half the nation did not even bother voting, so it seems unsurprising to me that focus has shifted away from this issue (and fair to blame voters for that).