Hi there,
After menopause, it is common to see small benign
ovarian cysts. They are not related to ovulation
and menstrual cycle as you are past that stage in your life.
Some cysts may be related to a malignancy. The decision to remove the cyst and or ovary will depend on the particular person , the size of the cyst, whether it is changing, family history, symptoms, and so on.
It is perfectly reasonable to remove this cyst at your age.