Absurdly enough, reading this soon after looking at the latest CBT app turd from Stone and Carson, the ideologues call this having poor metacognition.
They actually point to the fact that we are aware of having cognitive problems not as evidence that we have both cognitive impairment and awareness of it, but rather that we have some fear-based distress about potentially having such impairment, when in their opinion we have perfectly normal cognitive performance. Basically, we simply underestimate what is a normal cognitive function, with bits of having unrealistic expectations, based on who knows what nonsense.
So there's no winning. It is definitely different from dementia, we are as fully aware of our cognitive problems as we can be, but where there is usually a fondness to throw vague labels, such as alexithymia, or whatever is fashionable these days, when we explain that we have difficulties explaining those deficits, they love to throw the opposite labels when we explain that we are aware of those deficits, simply because they don't believe in them. Or, actually, that they have different beliefs about them.
In a person with normal reasoning skills, not tainted with odd biases, this argument is actually very useful, and likely an important clue. But it will always be distorted to push what is clearly the generic concept that has lately become the main fashion: we are simply afraid. Afraid of standing, of moving, of experiencing things, of thinking, of talking, of whatever.