I believe the modified Kardashev Scale is still based off of the original; so the scale starts at roughly Industrialization Age Humanity levels of energy harnessing. The explanation itself even says a "Significant portion" of the energy of it's home planet.
If they don't have a place on the scale, pretty sure that means that according to the kardashev scale it means that they basically have little to no advanced technologies that's worthwhile.
Wokistan wrote: Wouldn't they just not qualify as civilizations at all under the Kardashev scale?
With the real one, maybe, I don't know. But for our purposes it makes no sense to say "the civilization needs to be at least this advanced to get a page".
In Owari no Chronicle I for example have a civilization of sentient stones that were the main population of a universe (they have concept manipulation in ultra calculation power). I would argue that they are notable even if they don't reach the current lower border on the scale.