I, and I assume other people, are attracted to this mod because we don't like space travel. There is a strong appeal to having literally everything on Nauvis. So why no fulgora biome? Why is it still another planet?

There are 4 other planets, you could just make them north, south, east, and west. With a slice of nauvis in the middle.

Becouse this is a fork with it reenabled. The original had removed scrap. Just search on Everything On Nauvis and you find the variants.

I will add that it is not possible to include all game mechanics on a single planet, this version includes all.