How much cultural continuity is there between the different arctic peoples? We know that humans migrated across the Bering land bridge to get to the Americas. My assumption is that you had arctic people slowly making the journey across, until one day the bridge became closed to us.
So, when we look at cultural practices and archeological artifacts, do we see similarities between these peoples? Like for example the Nenets and the Inuit?
As The_Alaskan notes in this answer, there are indeed similarities between native Siberian and native Alaskan people.
It's also something of a misconception that somehow contact between Siberia and Alaska stopped with the submerging of Beringia. It did not, but continued on basically to the present, as u/kieslowskifan and u/poob1x describe here.
Yupik people in particular live on both sides of the strait, and Inuit (the people and language) split off as the latter migrated westwards about 1,000 years before present.