I think you are right, that capability does not yet exist. Consider posting a Feature Request forum topic for it.
I would like to filter for observations that have only 1 or 2 identifications, regardless of quality level and regardless of whether they agree, although being able to filter for ones that agree and ones that don’t agree would be nice too.
I know I saw something like this recently, but I’ve just spent 20 minutes looking for it and have become annoyed :-)
Thanks for any help!