This happened to a friends of mine. The wife was banned from the hospital for 3 weeks while they withheld food and drink for 6 days. They declared him incompetent but tried to get him to consent to a feeding port while guardianship was being decided. They wouldn’t even put her calls through. They pushed his daughter to file for guardianship or they would have the court appoint one. I think this happens often.
I have never had problems with my POA being excepted. The Medical one read like a living will. The doctors would have had to go with Moms wishes.
I have a feeling there is more to this. A wife is not usually banned. The daughter can call the Ombudsman if she felt the hospital was in the wrong.
Is your friend and the person you are getting info from the wife or the daughter?