It doesn't matter which I mean--it's all mechanistically implemented as far as we can tell. (For instance, Alzheimer's Disease has a major impact on metacognitive capacity.)

It seems extremely unlikely that, say, bacteria are pheomenologically conscious, because we do everything bacteria do and more when we're not (phenomenologically) conscious. However, rats seem phenomenologically conscious, and the jury is out on fruit flies and bees.

But that humans are the only metacognitive species is far from clear: https://www.animalbehaviorandcognition.org/article.php?id=1182.

So it doesn't matter what type of consciousness you mean. It all looks physical and the more we look at it the more evidence we get for the physicality. So there's no reason to not just say "consciousness".