Damn. Now I want a solarpunk isekai.

Recommendation: I just finished The Terraformers (2023) which basically has all the bullet points. It opens with a rich kid being executed by a forest ranger for LARPing a carbon negative campsite on a private planet to eat some skewed rabbit. Wealth inequality is still an issue, but technology is crazy; people figured out Earth animals were people the whole time, and baseline Homo sapiens are treated as animals if commercial interests are not restrained by government. I would be a miserable monster living in that arguably better future simply because of my upbringing: I love me a good burger and feel squeamish about people being born from bioprinters. It really humbled me, making me realize the current status quo must change if we want to improve society for everyone; a typical Japanese isekai MC would be a complete fish out of water.