If we were talking about weapons of mass destruction this still wouldn't be adequate evidence, however it does move the needle forward a wee bit where the topic of North Koreans supplying line troops, as opposed to a few technical advisors.
im not sure as to where your skepticism is coming from with regards to NK troops in support and warring in Ukraine, but if your reply above is any indication, let me help you understand that this is nothing like GWII.
We have intel from multiple allies, including our own, along with OPEN SOURCE INTEL posted here over last few days that CLEARLY show NK command AND ground troops in Russia at training grounds/being issued Russian gear.
Might i suggest some WD40 to lubricate that needle as it might be a bit rusty from over 20 years of inactivity?