Unable to answer "What’s this pole made of?" – Power Pole – https://osm.org/node/4612918212 via StreetComplete 57.1:

There is no pole. There is a seemingly newish transformator station close by. Maybe it changed.

Attached photo(s):
https://westnordost.de/p/203817.jpg
https://westnordost.de/p/203818.jpg