Unable to answer "What is the widest gap one can pass through here?" – Bollard – osm.org/node/2496464553 via StreetComplete 61.2:

Poller befinden sich am Ende der Straße und sind für Rollstuhlfahrer nicht passierbar (es befinden sich stattdessen Gehwege links und rechts der Straße)

Attached photo(s):
https://streetcomplete.app/p/293870.jpg

Unable to answer "What can be left here for recycling?" – Recycling Bin – osm.org/node/6811833795 via StreetComplete 61.1:

Not at this place but further down at number 63

Unable to answer "Are these opening hours still correct?" – BAWAG PSK (Bank) – osm.org/node/340515244 via StreetComplete 61.1:

Öffnungszeiten Mo-Fr
Kassa 9-13:00
Beratung 9-17:00

Attached photo(s):
https://streetcomplete.app/p/285576.jpg