Unable to answer "How wide is the bicycle path here?" – Marked Crossing – https://osm.org/way/51723193 via StreetComplete_ee 59.2:

unsure why this is a bike path, the crossing right before/after seems more ideal for biking

Attached photo(s):
https://westnordost.de/p/250557.jpg
https://westnordost.de/p/250558.jpg