As has been predicted here by myself and other ROK Heads, North Korean troops are being used to push Ukrainian troops out of Russia’s Kursk region:

The United States confirmed Tuesday that North Korean troops, who have been deployed to Russia’s western front-line Kursk region, have begun engaging in combat operations against Ukrainian forces.
Vedant Patel, principal deputy spokesperson for the State Department, made the remarks amid growing concerns that the North’s troop deployment could expand Moscow’s protracted war in Ukraine with security implications for both Europe and the Indo-Pacific region. (…..)
“Today, I can confirm that over 10,000 DPRK soldiers have been sent to eastern Russia, and most of them have moved to far western Kursk Oblast, where they have begun engaging in combat operations with Russian forces,” he added.
You can read more at the link, but using the North Koreans to fight in Kursk makes sense because Russia would then not need to redeploy their own troops continuing their long grinding offensive in Ukraine.