In the Kursk direction, the Russians do not engage mercenaries from North Korea because of direct combat operations, keeping them in the second echelon instead.
The mercenaries are subordinated to the 11th Air Assault Brigade. Currently, the North Koreans are involved in duty at observation posts and checkpoints, and they also guard areas where enemy troops are concentrated.
However, mercenaries are not currently involved in direct combat operations. In fact, the involvement of North Korean militants has allowed the Kremlin to take more Russians from their positions and throw them into a meat grinder on the front line, because the life of a Russian is worthless, unlike the life of a mercenary.
You can stop the policy of the Russian invaders and their collaborators by publicizing their crimes and demanding their international prosecution. You can also participate in rallies in support of Ukraine or donate to the Armed Forces of Ukraine.