When they stop eating, they want to go. Hope it goes easily for her. Do what you can, but try to avoid guilting her or over-urging. Follow her lead. Sounds like she is in a good place. Most important, is she at peace with the Lord?
I have no idea. Probably, but she had dementia and did not even recognize me or my brother and thought she was 22 years old and had to take her father, who is long gone, somewhere.