I have been using Lightroom on my iPad and when I have been importing photos 1 out of about every 5 imports with lines across the photo. I have tried using entirely different hardware to make sure it isn't my card or my dongle but the same issue keeps occurring. I've attached a few examples. When I import them onto my computer with the same hardware (card and dongle) they import just fine. Is this a lightroom issue or my iPad?
I'm not an iPad user, so I do not know what role the dongle plays, so I am asking you to explain further all the steps you followed.
This type of line is almost always a hardware malfunction. It could be the hard disk in the iPad or the memory in the iPad or even whatever port is being used.
Have you tried importing into Apple's Photo app instead of Lightroom? It would certainly assist in identifying whether the issue is gardware (i.e. your iPad) or Lightroom.
First go to Lightroom Classic and from settings import select Auto add from Camera roll.
Once this is set, you import from the sd card into Photos, the images will auto import into Lr.