There are things that are probably within reach of NK, such as Taiwan. TSMC manufactures the majority of the world's advanced microchips, and a fair chunk of the older stuff as well. NK can afford the oblivion of Taiwan, but almost everyone else would feel the shock for decades if Taiwan suddenly became a crater. To a lesser extent, the same can be said of Japan.

Mind, the Trump Regime doesn't understand the value of Taiwan, so Kim probably couldn't use that as a direct hostage against the US. Trump tried to extort Taiwan, asking for money or else the protection of the US could be pulled. That is just... 🤦

The key point, is that NK does have influence, it is just a question of how angry other nations would get if that stick smacks someone.