I’ll try to answer your question seriously (even though this is a darkly humorous subject). They would “want” to go back to protect their families from reprisals. The mistake the one NK who can speak made was to half-ass his answer. Something along the lines of “I really want to stay in Ukraine, but I’ll go back if I have to.” To channel Mr. Miyagi, you need to be “karate, yes” or “karate, no” on this one. “Karate, guess so” will get you the worst-case scenario. If you’re going to say you want to stay in Ukraine, you had better be all in and just accept whatever consequences that might mean for yours back home. Or the complete opposite: you better say there’s no place like home, North Korea is the Worker’s Paradise, and you’ll swim back if you have to. Otherwise, you might just find yourself back in North Korea with all of the consequences that would go along with defection.
North Korean Soldiers Taken Alive by Ukraine Video and analysis of the interrogation of the North Korean -- er, Asiatic Russians who only speak the North Korean dialect and lie their assess off that they're from North Korea -- occurs from about the 2:00-10:00 mark. North Korean Soldiers were Captured in Kursk - This is What They Revealed about the Russian Army This video is pretty good, too.
Interesting read. Russian drone operator took out a North Korean SAM. Significant as nobody knew NK SAM were in Ukraine and Russia air defense must be really strained if they are relying on NK sams Russia blows up its own North Korea-made SAM in Kursk "friendly fire"