Check around her ear and neck you’ll see a wire.
I’m not arguing against something in her ear. It clearly looks like something you would see in the movies or some kind of hearing aid. She is old and probably needs one.
That bulge at the back of her waist and the wire running up her back is the lapel mic wire and mic pack. I have run sound for 20 years. I put these on our pastor and worship team every week. They gave them wireless lapel mics along with the podium mic in case they stepped away, so they wouldn’t lose sound. DJT had one too, you just couldn’t see it under his suit.
You can focus on the ear all you want. There is probably something there. That bulge on her back has nothing to do with it.