Images skipped on import

Using Lightroom Classic with iOs system.  While on a trip a companion air dropped the trip pictures on her phone to my MacBook.  They were JPG and MOV files air dropped and saved in my downloads folder.  I then opened LR and attempted to import & move them into my LR organizing system.  There were more than 300 images and all but 12 imported just fine.  The 12 were a mix of the JPG and MOV files and were just left in downloads.  When I try to import those 12 again, they are darkened and showing that they were imported already.  I have double checked and they did NOT import---but LR won’t let me select them again to do another import to pick them up.  I had followed the same procedure with other air dropped images and had no problems.  But these last 12 are giving me fits.  How do I get them imported when I can’t select them?  Thanks.