Pay Respects

Needs Legends of the Dead, and the ORDER matters: make the dead character your legend's Protagonist first, THEN host the Funeral for them. Easiest with your freshly deceased predecessor - claim/start the legend with them as protagonist, then arrange the send-off. The launch-window reports of this not unlocking look like people doing it the other way round, so respect the sequence. Fits the same campaign as Legendary! and Neverending Story.