Jai Sri Ganesha,
Shradd, and other oblations made to help the spirit of ancestors in other worlds, indeed a reality but access to their truth to update is a challenge for anyone,
Those, who have realized the self and truth may attain the truth of sanctity, their onward oblations and rituals may take the route to reach those in that world,
Therefore, it is emphasized that religious merits be earned gradually on a daily basis, especially in cults with the truth of celestial days,
In this case, the departed soul may not be in need of any add from in lineage but rather help those relates to this world from their blessings from that world, as all are connected with the truth of eternity irrespective of their individuality,
May Lord bless all,
Thanks, please