And Kaddish isn’t a Ray’ah. We say Kaddish for everyone. R’ Elyashiv’s kids are saying Kaddish for him. Do you think he really needs it?
Dont quote me on this as I am not 100%, but I think Rav Elyashiv outlived most of his children and there might not be any SONS to say Kaddish (There are of course Grandsons, Great-Grandsons ,Great-Great Grandsons and I think at least one great-Great-Great Grandchild)