Just to add, I’ve made 20 minute connections at ICN without issue. The FA’s will find you on approach to ICN and let you know the latest status of your flight. If you’re pushed for time (and not in F!) they’ll bring you to the front of the plane to be among the first off. There will be someone at the gate either to escort you or tell you where to go. Transit security they’ll let you cut in line. Worst case they’ll hold the plane.