Is hospice and assisted living appropriate for pressure wound?

My uncle is 90, used a walker, but lived by himself in his own house. He went out every day, drove, walked on a treadmill, etc. up until three months ago. He fell in his house and was there on the floor for two days until the neighbors realized and got him to the hospital. He had unstable spine fractures, but was on blood thinners, so it took two weeks of him lying in bed before they had him ready for surgery. He made it through that but after more hospital time followed by rehab, he isn't able to walk, can move his legs but not much, is weak in the left arm and leg, and can't really move himself to even turn in bed. He can eat on his own and can move himself slowly in a wheelchair with his arms, but can't get in or out of bed or the chair himself. Not clear if the left side weakness was due to a stroke at some point or his lying on it for two days when he fell. He had swelling after the fall, but that has gone away. Not clear how much rehab he actually got in the rehab facility. I live out of the area and was there for the surgery and when he moved out of rehab, but not for the two months in between, so I can't say firsthand what was done. From what I've heard it wasn't much and it wasn't every day.

Rehab discharged him without much warning and the social worker told my sister she just learned he had a stage 3 pressure wound. My uncle told me afterward that they had been treating the wound for a few weeks. My sister wanted him in assisted living since she could not take care of him herself, but the AL would only take him if he was in hospice so that there was a hospice nurse to treat the wound. So he went into hospice at the AL.

Hospice nurse comes a couple times a week and nurses assistants also come. Nurses said the stage 3 wound was fairly small when they first saw it, but it is getting worse in the two weeks since then, has dead tissue, but is clean and not infected. Plan is to keep it clean and not do anything else. AL people are supposed to shift him every two hours, but don't unless he asks, so he is in the bed at night and in the wheelchair basically all day. Nurse has told them they need to move him more, but I don't know if it will happen. They seem very nice and attentive, but this doesn't seem to be what they are used to. My uncle has a reasonable appetite and eats his meals, but he orders what he wants and probably isn't getting enough protein for the wound. The nurse seems very thorough and responsive. She doesn't think the wound will heal with what they are doing, but it seems to be all she can do. I've asked about PT thinking if he could move himself more it might help with the wound. Not sure if it would help or not. His legs haven't moved much for several weeks and they hurt when he is moved in bed or to the wheelchair. Hospice won't do PT, but they can cover a one time evaluation to get recommendations on exercises they might do with him. The nurse doesn't think he will ever walk, which may be right. Not sure if he could gain some motion back though.

The question is if it makes sense for him to be in hospice or if we should be doing something else. He is not in good shape, but as far as what I know, the immobility and the wound are what are wrong. He doesn't have cancer or heart failure or anything else that you would expect to be fatal. He isn't diabetic. If the current situation isn't right, what are the options? Not sure who to even ask. As an added twist, the primary care doctor he had for years basically vanished a month or two ago. Gone without a forwarding address and the only one left in the office is a nurse practitioner who doesn't return calls. So the care he has now is all through the hospice provider.