Honestly, we don't have superpowers or a secret recipe for how to survive this. The body tries to adapt to some extent, on a polar night you want to sleep constantly, so whenever possible we try to sleep in our free time, like bears in hibernation.
On a polar day, sleep cycles just collapse. For many, the norm is to fall asleep at this time of year only at 2-3 o'clock in the morning, when the body is already at the limit and does not react to the presence of light. In my youth, it didn't interfere much, in adulthood, when you have to work on a schedule, it's hard. Maybe that's why there is an opinion that the Northerners are a bit slow