Finding One in Void Totem

The Totem of Void Undying is treasure loot: it is found in the chests of End Cities.

That placement is deliberate. The End is where the void is closest and most dangerous — the outer islands are separated by open drops, the main island has an edge on every side, and being knocked off by a shulker or an enderman is a routine hazard. The totem is found in the place where you are most likely to need it.

In creative it sits in the Combat tab, directly beside the ordinary Totem of Undying.