AND besides that, praying for someone that is already dead is useless. Only some Catholics and a lot of Mormons believe that but it is not scriptural at all. Pray for the families to be comforted yes.
Praying for the dead is scriptural. Jesus prayed for the dead and told us to pray for the dead.
May the Lord grant her to find mercy from the Lord on that day.
P.S. I guess it’s like the difference between Yizkor and Kaddish. /s