With elephants and smaller dolphins it's functional rather than physiological, but with highly intelligent animals with an infancy stages that lasts many years, and infants that need years of nurturing and education, this is provided by post menopausal females.
All these animals have females who are fertile for the first half of their adult life, and non fertile for the second half, all including traditionally humans, are available for the education and cultural conditioning of their grandchildren, while parents are hunting and providing.
As for the males, they all have shorter life spans, some live less than half the time of females
The menopause is not a problem that needs solving! It is an amazing evolutionary adaptations to protect the survival of the species, and works very well in intelligent species, and has worked in humans for at least half a million years before modern times.
Sure, if someone has a medical problem related to menopause, or at the same time as the menopause, there are treatments available, but I do feel that the current trend for seeing it as a medical problem is misguided, and quite sad