I found this nugget of information interesting on the daily assessment from the ISW.
South Korean Defense Minister Kim Yong-hyun stated on October 8 that a limited number of North Korean military personnel are likely operating near occupied Donetsk City.[11] Kim stated that North Korea likely deployed several military personnel to Ukraine to support Russia's war effort in response to a report that a Ukrainian missile strike near occupied Donetsk City killed several North Korean military officials on October 3.[12] Head of the Ukrainian Center for Countering Disinformation, Lieutenant Andriy Kovalenko, stated on October 5 that a small number of North Korean military personnel, mainly engineering personnel, are operating in occupied Donetsk Oblast and are repairing or somehow improving the quality of a large amount of low-quality ammunition that North Korea provided to the Russian military.[13]