Dismissing DPRK advances is the exact same chauvinism as when Americans dismiss Chinese advances as stolen, copied or just somehow inherently inferior.
I would also remind people that both China and Russia agreed to very severe UN sanctions on the DPRK as late as 2017 exactly because they were uncomfortable with their weapons development. Those sanctions are still technically in effect from what I understand and it wasn't till some time after the start of the SMO in Ukraine that Russia vetoed the budget for enforcing/monitoring the sanctions that the DPRK would be able to more freely import machinery and dual-use components while several systems have obviously been in development since before then.
A few decades ago, before their physical economy was undermined by financialization, France was competetive on nuclear submarines, submarine launched ICBMs, nuclear warheads, fighter jets (with indigenous engines) and more on the military side, while also doing nuclear power, civil aviation, high-speed rail, rockets, satellites and multiple internationally successful car companies on the civilian side.
1. The DPRK population is only half of what the French was at the time, but it should be possible make up for that by having a narrower focus.
2. No-one would say any of that stuff wasn't french just because they imported various components from friendly countries or because some of their engineers studied abroad.