Thanks for adding this - the separate sidewalks added in this area seem to have been more decorative than functional, so are currently of limited use for pedestrian routing.

In order for routing engines to include a new edge in the routing graph, the added way generally needs to have a highway=* tag, in this case highway=footway.

I have added this, together with information about the crossing (type, accessibility, etc.) in https://www.openstreetmap.org/changeset/136128749