How to know a person's death is near and is giving up?

I visited my mother almost every weekend when she was in her 80's and I always wondered whether she would be there for the next visit, she actually managed pretty well until her early 90's and died at 99. Age alone is no predictor and even chronic conditions can remain stable for many years, unless there is something else you aren't telling us I don't see a little bit of decreased appetite and diarrhea as a precursor to death. Do keep an eye on things though, take her to the doctor if it goes on more that a few more days.

It’s not really diarrhea she’s doing today she doesn’t have COVID or any of those symptoms she was check at the doctors and has anemia and is on medicine for that she said she’s embarrassed because we have to help her do everything but we don’t mind whatsoever she’s are everything yesterday I asked her if she’s ready to go with God she told me no I’m not ready to go with him! She just left tired of being tired and weak she wants her strength

Take heart from the fact that we need VERY LITTLE food when we are older, to stay alive. The banana is great, the coffee for some energy and she is hydrated.
Now on to the diarrhea. How long? Is she on antibiotics or other meds that can cause it? Does she have any covid-19 symptoms? It can sometimes present as diarrhea and stay on for 9 or more days. Is there any reason you know of for the diarrhea. Does imodium work for her to slow this down? Wishing you luck. Do know that hard as it is for you to imagine, elderly folks LOVE to sleep and get very very tired, both in general, and of living also. They just get tired. Giving up is often not that to them, but longing for release and for peace. Have you spoken to her about your worries for her? Has she anything to tell you about how she feels?