I had a young cousin with terminal cancer, and she had a jejunostomy tube, because she could not digest or absorb food properly any longer. She had all these specific instructions for maintaining the tube, probably because if she got an infection from it, she would likely die even sooner than predicted. It was a lot for her to memorize, but she eventually did.
I asked her if she ever felt hungry, and she said no, but she rarely felt hunger in the months leading up to the tube placement anyway. She was so nauseated most of the time that she didn’t want to think about food.
I guess it’s that way with most patients who have the tube. Something had to be dreadfully wrong with them for them to need it in the first place, so they probably don’t yearn for food.