How do I Export from Lightroom, retaining NLP metadata, AND

I want to export images out of my Lightroom catalog and onto my Desktop for archiving. These images are camera-copies of film, and I have edited the NLP metadata to show the film aperture, shutter speed, etc.

These images were imported into Lightroom already inverted, so NLP was not used for anything except editing the metadata.

These images have captions and keywords added in Lightroom’s regular metadata fields, which must be retained in the exported images.

So far, I have not been able to find the correct Export settings which allow me get the images out of my Lightroom catalog and onto my Desktop with both my Lightroom Captions AND the NLP camera metadata. I do not want to duplicate the images within Lightroom!

Is what I want to do possible, and if so, how?