Is there a way to integrate this bicycle bus across the river and the Kanaaldok into OSM so that route planners like Graphhopper, Valhalla and OSRM can treat it like the ferries?

https://www.portofantwerpbruges.com/de-fietsbus

In context of overlay "Sidewalks" – Smalleweg (Residential Road) – way/25879403 via StreetComplete 59.2:

Sidewalk on side of park limited to 40cm without obstacles

Unable to answer "What’s the name of this street?" – Residential Road – way/29463210 via StreetComplete 59.2:

It is a break in the median where side streets on both sides have different names.