That looks great!
It's C# though, so I have no idea how to build this under Linux. I also wish there was a Minetest backend.
Similar: OSM to Minecraft[0][1] (there should be another code drop soon-ish, I heard [2] they plan to move the dev effort to GitHub by the end of the year).
[0]: https://minecraft.ign.fr/
[1]: https://github.com/ignfab-minalac/minalac
[2]: video, in French: https://peertube.openstreetmap.fr/w/cLpfr5jWd9SipjJTDKDPmj?s...