What Yadid said.
You can try to check if the following is happening: rather than not noticing anything, you're actually constantly paying attention to a sort of background which seems solid, and is so familiar (due to being there for so long and you taking its existence for granted), that it seems there's nothing there.
Widen your attention, notice (and note) "not noticing anything," and notice in detail what "not noticing anything" is like. See if it moves, or vibrates or tingles a bit.
Btw, you say you're craving for the dukka nanas? How about:
- getting frustrated
- feeling stuck, like you're getting nowhere
- feeling like you can't focus on the object
- feeling out of sync / disconnected
- feeling "really bothered"
All of these are things you mention in your post. They are exactly "what you should be noticing." Anything that happens is it. It's not like there are two things happening in your experience, some are "it" and you should be noticing them, and some are "not it" and are instead "signs that you are not noticing properly." If you are doing noting practice like there were these two kinds of things, then your are not noticing properly

To spike your curiosity, you could ask yourself: what is this feeling of "being stuck etc" like, exactly? Why on earth do I feel "stuck"? Stuck where? Why isn't it just perfectly fine to sit here noticing what it is like — and enjoying — being alive? There will likely be resistance, impatience, agitation, and other forms of restlessness.
You can end your "craving for the dukkha nanas" right there ('cus you got 'em).