I would like to use the IPTC value of "City" for a number of things.
In the Grid or Loupe view "Sublocation" is an available option but not "City" (image below).
I would like to be able to select "City". Is there a way to do this?
In the alternative, is there a way to copy the value in "City" to "Sublocation" in bulk to a collection of selected images?
It's strange that Sublocation is included but not the other IPTC location fields. Unfortunately, there's no way to change that. You could file a feature request in the official Adobe feedback forum: Photoshop Lightroom | Photoshop Family Customer Community
is there a way to copy the value in "City" to "Sublocation" in bulk to a collection of selected images?
Not with the built-in LR features. But the Search Replace Transfer plugin will do it.