When I exported them, they appeared having transparent backgrounds, but when I sent them back to my phone, they were white. I even exported them to my computer, to iCloud Drive, then back to the Photos app to check if they were still PNG files and didn't somehow convert themselves to JPEG, but they still were. I don't exactly know what went wrong or how, since images that previously displayed a transparent background suddenly don't anymore. I started having problems with my PNGs a month or two ago in which half of them no longer show a transparent background when imported into my photo editing apps. I frequently use PNG files in photo editing apps on my iPhone.
