How to LOCATE photos, on iPhone, which aren't importing to my Mac?

There are a few old-ish photos (2019 or so) from the previous (family) user of my iPhone which just refuse to import into Photos on my Mac. That's fine; my 17-year-old sister has thousands of photos and does not need these five selfies! So I want to remove them from my iPhone—but I can only do that *on* my iPhone, and I don't know how to locate them there. I can't double-click on yet-to-be-imported photos to get a full view with details about the image. If I had the date for the photo, I could navigate to that timeframe on my iPhone and remove it there, but I can't figure out how to access that info from my Mac before the photo has been imported!