If the North Koreans lost a submarine would other countries such as the UK/USA offer them help to find it, particularly if it could one day point missiles at th

If the North Koreans lost a submarine would other countries such as the UK/USA offer them help to find it, particularly if it could one day point missiles at the USA? Maybe there should be an on-going 'lost-submarine test' where world tensions and hostilities are gauged by how many countries participate in military search and rescue operations. A North Korean Navy sub did sink in 2016 but North Korea did not admit nor request any assistance. https://news.usni.org/2016/03/11/u-s-official-north-korean-submarine-is-missing-presumed-sunk https://news.usni.org/2016/03/11/u-s-official-north-korean-s...