Would you push for a new med for hospice patient?

My dad has cancer and it's rapid. He also has pneumonia and hearing his wheezing and deep bronchial sounds when breathing is very sad. They're treating him with morphine and said it can help relax airways. But I read online it's often used with a nebulizer or steroid too. I said today that his wheezing is really chronic, and could we do a steroid for a day. They basically bypassed my request with just more morphine. It's not really helping and while I understand we are not going to actively treat it, I think something else should be given now that he's in a lot of distress.
It's just about labored breathing even though nurse said it's not really affecting him. I believe it is. Should I push again tomorrow for alternative med?