I think this may be a stretch. The story is mostly, sketchy and 40 minutes is barely time for “hello and goodbye”, broken up by tea or drinks being served, and a private photo or two.
It is no secret that the SK leader and Obama have no use for the POTUS. Just a social greeting keeps that theme visible, and the communist grids greased.
They talked about their grandkids.
Oh wait, that won't work...