How can I make my grandmother with dementia and broken hip who is now bed bound more comfortable? She cannot talk to me anymore.

Why does your grandmother not have Medicare?

A broken hip is very serious. Did she not have it operated on?

Yes the Morphine can cause problems.

Yes, definitely contact your local hospice agency as they will be of great help. They will supply grandma with a hospital bed, diapers, pads, medications and whatever else she might need, and it will all be covered 100% under grandma's Medicare. I know you say that she doesn't have Medicare, but unless she is very young, she does have Medicare. Hospice will also have an aide come out a couple times a week to bathe her too, which will be very helpful for you.
My husband was completely bedridden in our living room under hospice care for the last 22 months of his life. He was quite comfortable in the hospital bed that they supplied, so please call them ASAP.

Contact Hospice. She would qualify from your description.
You would get the equipment that you need to make her more comfortable.
You would get extra help a few days a week.
Unfortunately without surgery the life expectancy is rather short. (given the other conditions of dementia and being bedbound.)
Hospice would help make her as comfortable as possible