MyMy mother currently is in an Alzheimer's care unit without her authorization or any siblings. May I get her out of there or how do I go about to get the current PO? A can I exclude my niece where she hasn't updated any family members on my mother's condition or Anything update
Your real problem is your relationship with your niece. You cannot just remove your mother from a nursing home or memory care unit because YOU don't think she belongs there. Being responsible for an elder is an incredible amount of stress and work. I doubt your niece is doing this for fun or as some sort of power trip. You should be thanking her and asking how you can help. Your only real option is to get an attorney, prove neglect of duties on the part of your niece, and ask to be named guardian. That will be expensive whether you win or don't. Also, who is paying for her care? Someone needs to manage all of the financial and medical paperwork as well.
Where were you and your siblings while your mother was deteriorating before she was placed? If you were so concerned about her well-being, why didn't you help her sooner? Why did she name her niece instead of one of you?