I have found this mod after building up quite a base and deleted all empty chunks after which I enabled all the SA ores and features for Nauvis, though they do not spawn.
The only thing that spawns is Scrap, but that does not seem to care about the "Frequency" I have set in the Map Editor "Edit map gen settings" tab.

Would be cool if you could look into that.

Edit: Seems like the "Use settings from Nauvis" setting for creating a new surface does not copy the settings for Tungsten ore, which now leaves the situation as follows:
- New surfaces seem to be fine
- "Edit map gen settings" for Nauvis and then regenerating chunks does not spawn anything besides scrap.