it’s not clear to me this is strictly limited to ford. apple added nav support for the tesla supercharger network (NACS) in maps. Ford was the first non-tesla brand with access to NACS but many others can use it now and more will in the future. Ford also released a PR statement about it but obviously they aren’t going to mention other car brands in it.

edit: as the other comment mentioned, this feature will only work with cars that share the car’s SOC through CarPlay so apple can plan your route with chargers. This is a choice of the manufacturer to offer that support, not a limitation by apple.