Hi i know the question of white boxes instead if pictures comes up quite a lot but the difference is that I got the card deck from somebody else (where it worked and they could see the pictures on the android and on the desktop) but I only have mobile (so iPhone and iPad) and Safari (so Anki web) on the iPad. But in neither of those three I can see any pictures. I checked and it says that it’s completely synchronized so I’m not completely sure what to do.
Perhaps the person who shared the deck with you forgot to include media files when exporting? If you imported the material already and they re-export the deck with media files, please make sure you delete the cards before importing again, as media files will not be pulled in for notes that were not modified more recently on their end.