Finding images taken with other camera apps?

When searching Photos (Mac app) for images taken with Halide (iOS app) I get these the preliminary suggestions...

It would seem that the photo is tagged somewhere since the full name popped up with just three letters and has an app icon in front of it.

My question is, where is this info tagged or keyword within the image? I'd like to access this info more directly and see what other third-party camera apps I've used. I'd also like this info to export with the file if possible?