Occasionally the controlling authority may decide to permit bicycles to also use the footpath.

You seem to be suggesting, where both the carriageway (road) and the footpath are mapped, the footpath should not be named.

When a walking or hiking route is prepared which includes these footpaths, any route list will include the name of the street.  This way the walker/hiker can confirm they are on the right route.

For wayfinding, Open Street Maps suggest online tool WayMarkedTrails.org.  A look at most countries, using that tool, shows a very large number of walking/hiking routes.

I would be pleased to continue the discussion and look forward to hearing from you.
