text: You may need to contact the people who provide routing services rather than OSM. The bridge is clearly marked on OSM as highway=footway (which implies no cycle access) an has steps=yes which, although not the most widely used tag, is a perfectly valid one (80 odd uses). (Mind you I know of at least one NCN route which uses a railway footbridge). The way could be edited to either add highway=steps nodes either side or splitting the way to add the steps.