I’ve been interested in flying to places with Polar Night. The most northerly commercially accessible airport in the world is Svalbard Airport in Longyearbyen, Svalbard, Norway. ICAO is ENSB. It is a fairly major airport with 2,484 m asphalt runway that has commercial air service. I think Microsoft/Asobo inadvertently overlooked this relatively important airport (vs. all the small airstrips that were included globally).
As the days lengthen, this would be an interested airport to include in an update. I suggest Microsoft/Asobo include this relatively major airport that was missed and would be interesting to fly to.