I came across this tweet from VICE News researchers are making a dictionary for a Korea that doesn’t exist yet which has the tag:
North and South Korea Are Butting Heads Creating a Unified Dictionary
While it isn't necessarily that I don't believe that a unified North and South Korean dictionary doesn't exist, often times it is that linguistic resources get published to little acclaim and often go unnoticed by the general public.
Another scenario could be that comprehensive online sources do exist but have not been published.
For instance the video mentions how the word bento changed in the North and the South; Wiktionary has the word:
- '도시락'의 북한말.
Which mentions that it is the North Korean word for "lunchbox."
Does a unified North & South Korean dictionary really not exist?