That's not on-map, that's hidden behind a click. osm.org/copyright makes it very clear that the attribution needs to be on-map. You don't see Google permitting people to hide their brand away like that!
Apple's maps are not just OpenStreetMap - there's a lot of other data sources in it too.
For the OSM data Apple do use, I think it's quite old OSM data from 2010-2011 or something. As far as I remember, they used that because the license changed after that, so I believe that's under different terms.
