Yes, there are lots of disputed countries and autonomous regions, etc., which are not official UN member states.
personally, i think this is probably the wrong approach, although it should run relatively quickly once it is set up, it would just require too much maintenance to keep it doing what it was intended to do, i think, and it’s relatively inflexible.
i’ve updated my page from before so that it can optionally pull back counts of observations, species, identifiers, and observers. as i noted before, it may take a while for the data to be retrieved, but it’s a more flexible approach than setting up a bunch of projects.