How to Get Metadata for Instagram Photos
PixelPeeper.io can reverse-engineer edits from photos, but it needs JPGs with metadata. Instagram strips metadata from files, but there are work-arounds you can try.
Photos downloaded directly from Instagram won't work with PixelPeeper, because they don't contain metadata. Instagram strips it to save up on bandwidth (metadata makes files bigger).
There are also privacy concerns: photos taken on phones can contain the exact location they were taken at. If they didn't remove it, you can only imagine what stalkers could use it for.
So, there's no way to get metadata directly from Instagram, but if the author has a website, there's a chance they upload the same photos there as well — and you have a much bigger chance finding original photos with metadata on their website.
For more details, see: How to Find Photos with Metadata