I can find some SDGs activity by UNDP. There seems to be room to propose a Demo, as none of them seem to have reached a point of significant expansion.
https://www.uninnovation.network/projects
https://feature.undp.org/beyond-bitcoin/#group-5-things-blockchain-can-do-for-the-sdgs-CWDXIGEkKN
https://undp.medium.com/a-fair-deal-for-ecuadorian-cacao-farmers-47f2be97b281
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