Can death rituals be performed after many years?

Yes. There is no expiry date on ancestral rites in Hindu tradition. Families who missed Pind Daan, Shraddha, or Asthi Visarjan even decades ago regularly perform these ceremonies with us. The soul receives the offering regardless of when it is made. For families where rites have been missed for three or more consecutive years, Tripindi Shradh is specifically recommended to address the accumulated ancestral debt.