It's hard to find #solarpunk at all, but my friend is right about it being even harder to find in audio.
If you're interested, check out the audiobook tab on my website for not only #solarpunk but #cyberpunk #steampunk #futuristic #scifi #YA #SF and #shortstory collections:
https://susankayequinn.com/
Folks should also be aware that @grist Imagine 2200 #solarpunk stories are in audio as well (at least the ones 2022 and prior are human, not AI, which I hate):
https://grist.org/imagine2200/
h/t @amici