Usually I shoot RAW, with an iPhone 12Pro. Yesterday I mistakenly shot JPEG. When importing the files into Lightroom, I highlighted (as always) "Copy as DNG", which says that it will "copy to new location, import, and convert to DNG". However, after importing, the files remain JPEGs. Am I interpreting this import dialog incorrectly? Is there a way to convert these to DNG after the fact? Thanks for any help.
After you import the jpeg to Lightroom Classic you can export the file as DNG, a new file will be created and put in a DNG “wrapper” with a .dng designation but the file inside the DNG remains jpeg data. So you will have two files a .jpeg and a .dng.