if you have power of attorney and they pass. does it continue after death

No, a power of attorney ceases to have any validity immediately upon the death of the principal (the person who made the power of attorney). After that point, only a properly appointed Executor (if there is a Will) or Administrator (if there is no Will) has any power to handle the deceased person's probate assets. Assets which passed under a beneficiary designation or a right of survivorship belong to the beneficiary or surviving joint owner, and can only be controlled by those people (or their attorneys-in-fact under their own powers of attorney).