That would make sense. And I did find an item “Open in obsidian” in the context menu of zotero items,
and clicking it brings me to Zotero but doesn’t open the corresponding literature note.
I also see that link in the 3-dots-menu of annotations:
It also opens obsidian but not the note, let alone the annotation.
Maybe it’s simply not yet fully implemented…
Obsidian supports block-level references by default and it creates that unique identifier once you refer to a specific block (i.e. annotation). So for that there shouldn’t be a need for those IDs. Besides: the IDs are “attached” to the heading for each annotation, not for the annotation itself, so that you can only use it to refer to the heading, not the actual annotation. And to refer to a heading, you don’t need any ^ IDs at all because you can refer to headings directly.
Here is an example (ignore the #3, I don’t know who put it into my screenshot 
) :
So, here I’m creating a reference to a literature note called Follet1919, by pressing ^ I open up available blocks to link to in that note, and as you can see, the annotation “The creative power …” is available as a block reference (#1). And so is, of course, its heading “Page image 2” (#2), but not because ot has a ^ ID but because it is s
also a block like any other.
I guess we’ll understand better as the documentation evolves…