Unable to answer "What’s this made of?" – Bench – https://osm.org/node/4436813857 via StreetComplete_ee 58.2:

Wood in middle, stone ends and supporting.

Attached photo(s):
https://streetcomplete.app/p/336044.jpg
https://streetcomplete.app/p/336045.jpg
https://streetcomplete.app/p/336046.jpg