In theory, yes. The problem is that NATO and the West understand that North Korea's decision is to send troops to Russia to fight Ukraine. In their shared view, this has nothing to do with Russia or the DPRK, but with Ukraine.
In fact, they are claiming that the American authorization for Ukraine was given three days ago; the massive attack by Russian drones and missiles on Sunday would not have been considered in this decision, as other important sources have implied. The authorization has nothing to do with Sunday's attack.
In such circumstances, it would be difficult for such a decision to have been made without the approval of President-elect Trump. Strategic decisions in the US are traditionally bipartisan. And this would be a strategic decision. Even with Trump's son's denial in a post on X. This may have been agreed upon at the meeting between Trump and Biden at the White House, and could be a measure to pressure Putin to the negotiating table.
If it is indeed confirmed, it could be part of Trump's strategy to try to force the start of negotiations. Personally, I think he failed to coordinate with the Russians. They are unlikely to accept this kind of pressure unless these attacks lead to internal upheaval such that a power shift occurs in Russia. The problem is that before that point is reached, nuclear weapons will be on Russia's list of priorities.