In fact, South Koreans are not very interested in the North Korean language.
Taking this question as an opportunity, I looked up the North Korean dictionary.
As a result, there seems to be nothing worth considering as a dictionary.
However, I was able to find a site provided by the South Korean Unification Ministry.
This is a dictionary service for language comparison between North and South Korea.
https://nkinfo.unikorea.go.kr/nkp/term/skNkLangCompare.do
This site is a very small dictionary service that simply compares words.