That's been announced at least four times now, if you count Akon's vaporware city.

- Satoshi Island [1] STC coin, value near zero, volume zero.

- Cryptoland [2] There was an NFT land deed, but the site is dead.

- Praxis [3] Still in the hype phase.

None of these projects seem to have ever built anything in the real world.

[1] https://www.satoshi-island.com/

[2] https://www.youtube.com/watch?v=ZFoAF6lY6iI

[3] https://cryptonews.com/news/utopian-city-project-for-crypto-...