There is little Europe can do to punish North Korea directly for sending troops to Ukraine. Indirectly, though, Europe can do a lot to strengthen its ties and military cooperation with South Korea. That is something that may even scare China enough to pull North Korea's leash.

this moscow pyonyang axis its also a political aliance to challenge china, now any NK or russian desition can be support by the other, baypassing beijing and if you add a korean, japanese or even a taiwan pact with europe, the one china idea its death

a nato plus australia, japan, taiwan and south korea would be a huge change to the global power structure