Unable to answer "What kind of fire hydrant is this?" – Fire Hydrant – https://osm.org/node/5037194015 via StreetComplete 57.2:

On ne voit pas la prise d'eau. Est-ce "poteau"? The water pipe is not visible so I don't know what to entry to choose.

Attached photo(s):
https://westnordost.de/p/208243.jpg