Does it have any effect on routing when simply selecting the building? (I’m aware that each of the 3 routers on OSM works a bit differently and takes time to update). Ideally routing would lead there and not anywhere else around the building.
Historically it hasn’t been routing per se that’s the challenge, but geocoding. A router would generally just find the best route between two pairs of co-ordinates. It’s the role of the geocoder to turn your text input into co-ordinates.
But Nominatim (the best-known router) has recently added support for entrance nodes. So the task, I think, is for websites/apps which provide an interface to routing engines - and one of those sites is, of course, openstreetmap.org - to make use of this new feature. I’d be interested to hear of any such sites or apps which have done that.
Interesting. Access for separate wheelchair entrances might need such tags.
I gave it a try with an internal area and connected this to the entrance at Way: 1471485439 | OpenStreetMap . Either it needs more tags or takes time to update to work.