Hello John.
Though I don’t use it that often the possibilities I use.
1. My camera (Panasonic) has an app for my iPhone and iPad that supports control for the camera. One of it’s functions is to register (on the iPhone, my iPad doesn’t support GPS) to register gps-location that I can batch transfer afterwards to the RAW-files in the camera.
As that consumes lot’s of battery consumption from my iPhone in practice I mostly use the following procedure:
2. If I like to have the gps data for my picture files (RAW HEIC or whatever) I tend to shoot a picture at that location with my iPhone (which automatically stores GPS-data) I then, either back home or during a trip on my iPad, I import the Raw-files into Apple Photos app as original RAW. And I import the relevant files from my iPhone. In Apple Photo’s I then “batch-copy” the location data to the relevant Raw file in Apple Photo’s Afterwards I use Nitro to do the edits.
i use the ability of Nitro to share the edits between iPad and iMac in either the (separately created Photo’s library) or Files).
Hope I pointed out clearly enough my workflow.
Of course you may find this cumbersome. But that’s the way I cope with it.
3. If I have forgotten to register the gos-data, I afterwards look up the location through maps of browser and then copy the gos data into Apple photo’s and do the batch editing to the files.
HtH
Ben