This article from national geographics[1] explains it well I think. Objects were lost in the snow by travellers crossing the mountains up to 2000 years ago, over time they got covered in stationary ice (glaciers move and crush items).

Now these stationary ice pockets (and glaciers) are slowly melting, leaving well preserved lost items from the old days in its place.

[1]: https://www.nationalgeographic.com/history/2020/04/lost-viki...

Global warming is melting away the glaciers.

The Internet has been ubiquitous for a couple decades, and most of Norway is "remote location" where trekking been always popular. So, no.