HI, thanks for using healthcare magic
It is possible that the symptoms are related to
depression but her doctors need to rule out other possible causes first.
Disturbance in some electrolyte levels and low
thyroid hormone levels can sometimes cause an altered mood.
In addition , it is possible that her condition and any medical treatment that she is receiving is involved in causing some of her symptoms.
Depression can present with depressed mood, loss of interest in activities,
fatigue, change in sleep habits, change in appetite, feeling of hopelessness , problems concentrating or making decisions.
If other causes are ruled out then her doctors will likely consider assessing her for depression and initiate treatment.
I hope this helps