Is Madam Chung medically fit to revoke LPA

A LPA is a very serious piece of paper that accorded great powers to the
holder over the finance and wealth and health of a person that gave the
LPA to. Now Madam Chung Khin Chun is under an appointed medical expert
to determine if she is medically fit to revoke the LPA. What if she is
found to be unfit to revoke the LPA? Would the holder of the LPA still
retain the power and continue to