Unable to answer "Where is this fire hydrant located?" – Underground Fire Hydrant – node/2698250030 via StreetComplete 60.2:

The hydrant is maybe in the wall. Otherwise I'm not sure it exists.

Attached photo(s):
https://streetcomplete.app/p/265071.jpg

Unable to answer "Do these traffic lights have a tactile indication for blind people for when it’s safe to cross?" – Crossing With Pedestrian Signals – node/6283006525 via StreetComplete 60.1:

There is a vibration device for blind but it doesn't seem to be working.