Do you have a breast or ovarian cancer history in your family? Have you done the BRCA gene test to see if you have that mutation?
It's always best to keep the ovaries if you can - they keep providing estrogen you need, even at lower levels, forever.
If you have a higher risk of ovarian cancer, that's something to consider, or if you have a history of large cysts like this, but it's up to you.
The ages for highest chance of ovarian cancer are 55-64, then it drops slightly for the 65-74 group. The median age is 63.
https://ocrahope.org/get-the-facts/statistics/