Well, you can add another “dead for good” main character near the end of Shadowbringers.
At the end of Endwalker, you take a jaunt through the aetherial sea (lv 89 dungeon) on the way to see crystal mommy.
The spirits of all your fallen friends (and a few foes) make cameos during combat. It really draws the story arc to a nice close.
I get called out for it all the time in game, and I absolutely love it. ❤️