They literally have a green leaf next to power saving options. Also, there's an option in windows upgrades to time the upgrades to when the grid is mostly renewables.
https://www.pcgamer.com/windows-11-update-will-help-your-pc-...
https://blogs.windows.com/windowsexperience/2024/04/22/reduc...
"Yeah, uh, my local electric provider is burning coal 24/7 except at 9-10 pm on these 5 dates each year...."