Unable to answer "What’s the name of this street?" – Pedestrian Street – way/1164694231 via StreetComplete 62.0:

That seems to be the sidewalk to the Jernbanegade, not a separate street.

Attached photo(s):
https://streetcomplete.app/p/317403.jpg

Unable to answer "What are the opening hours here?" – Restaurant Saxildhus (Fast Food) – node/3814373856 via StreetComplete 62.0:

Part of the Hotel Saxildhus. The hotel doesn't have a separate restaurant (only a breakfast buffet for guests)

Hier ist jetzt das griechische Restaurant Trojan:
https://trojan-eschede.de/

Unable to answer "What barriers are used at this railway crossing?" – Railway-Road Crossing – node/3679057405 via StreetComplete 61.0:

Not sure how to categorise this - it's a regular gate that can get locked.

Attached photo(s):
https://streetcomplete.app/p/281565.jpg

Unable to answer "Is drinking water available here? If so, what is its source?" – Euro-Trinkbrunnen (Drinking Water) – node/12337229432 via StreetComplete 60.3:

An dieser Position ist ein Beet. Ein Brunnen war nicht zu finden.

Unable to answer "Are these opening hours still correct?" – Café am Planschbecken (Cafe) – node/245214984 via StreetComplete 60.3:

Laut Schild an der Tür:
Sa & So 11:00 bis zur Dämmerung
Bei Regenwetter andere Schließzeiten möglich

Unable to answer "How does this path cross the barrier here?" – node/10138117772 via StreetComplete 61.0:

There doesn't seem to be a way through here apart from the stairs to the west.

Attached photo(s):
https://streetcomplete.app/p/280465.jpg

Unable to answer "This shop has been vacant. What’s here now?" – house number 42 – node/492092041 via StreetComplete 60.3:

Gehört zum benachbarten Marker für die Hausnummer 42 (REWE)