vogelfreier
According to JOSM with aerial photo "Maxar Standard aerial photos (Beta)" depending on the zoom level, a white area (ice / snow) is to be allocated to the marked area, especially since the GPX track must still be taken into account when downloading. After the available data the value has been completed with "winter_road=yes". So after the wiki page this should be understood: https://wiki.openstreetmap.org/wiki/Key:winter_road .
If I follow the "road" to the far north, where it meets the mainland at https://osm.org/go/UVSZA0ZE?m=, and look at the GPX track, there is no big offset or a ball in the GPX track (due to waiting time).
So in short, who knows more about the location in the ice, may change this (or due to the climate change the road will probably be omitted anyway and a longer route over the mainland will have to be found, which will be hopeless).

Translated with www.DeepL.com/Translator