FOSS gamedev and creative worlds

There is an exporter for minecraft for this in python. I was wondering if it could be converted to work with minetest.
https://sketchfab.com/exporters/minecraft

https://sketchfab.com/models/862acc620e844e64a16fb43ccf5259cf

The map and schematics formats used by Minetest are different from those used by Minecraft. From what can be studied here it seems Sketchfab uses some sort ofCollada (*.dae) format. As far as I know there seems to be no exporter for Minetest 3D content to some other major 3D format planed at the moment.