power of attorney can the medical POA remove the financial POA from a will…

power of attorney
can the medical POA remove the financial POA from a will without informing her? My aunt’s life was taken over by her ”caretaker ”who had medical POA. She had dementia when she died last month .No family or friends have been allowed access to her for quite some time. Before this she told me several times that she was being mistreated and I witnessed this. However when I tried to help she would not tell authorities because of her fear of this woman. After her death the Financial POA called lawer to begin execution of the will and was informed that she had been removed. This is not the first POA that she removed. I feel that this ”caretaker” preys on the elderly, vulnerable and disabled. Again, no one was allowed to speak to my Aunt. Thank you