You can get some info on the tag use with taginfo, e.g. https://taginfo.openstreetmap.org/keys/cuisine#projects But it is really technical and not all projects provide this info.

The most obvious place where people will look for and query this kind of data are the OSM-based map apps: OsmAnd, OrganicMaps, CoMaps, mapy.com etc. I don't know if this data is pulled into other major maps like Google's or Apple's.