Have you tried doing a video call with the dog to see how she reacts?
My husband had to be away from home for a month a couple years ago, and our dogs (and I!!) missed him terribly. When we would video chat, one of the dogs loved it, he recognized my husband on the screen and was so happy to hear and see him! The other dog did not understand what was happening and was kinda bummed to hear him but not see or smell him.
If your dog watches TV and does other things to indicate she sees what’s on the screen, knows it’s not in the room, and isn’t bothered by that, I think it’s worth a try!