If anything Russia is testing DPRK’s weapons against American/NATO tactics and weapons of war. The DPRK is dedicated to peace above all else and would much rather spend their meager resources on feeding, housing and giving leisure and comfort to the Korean workers. The Korean People’s Armed Forces are 100% dedicated to just two objectives.
Objective 1. Self defense against the US, Japan and any other Western nation (I don’t care if Japan is ethnically East Asian, they’re Western at this point) and any other threat to their homeland.
Objective 2. The defense from takeover by the puppet regime in the fictitious “South Korea” and when the time is right, the liberation of all of Korea, and to move the historical capital of the Unified People’s Republic of Korea from Pyongyang to its proper home to Seoul (or Kim Il Sung City).
The DPRK is one of the few nations on earth with a military of their size that has ZERO interest in conquering even the tiniest speck of dust outside of their nation, especially since the express purpose of jucheism is communism in one nation with the goal of stage 3, the elimination of Korean nationalism (even if by force) and borders to join the international community in the worldwide international worker’s state. Even if this process will have to be over a span of centuries.