Verifying the Data Pack Is Active
Before heading out to collect materials, verify that your world has successfully loaded the data pack and registered its custom recipe.
Checking the Datapack List
Open the chat window and run the command /datapack list. Minecraft will print the status of all installed packs to your chat log, split into enabled and available sections. Confirm that the craftable totem data pack is listed under the enabled section. If the pack is displayed under available but is not active, enable it by running /datapack enable "name_of_pack" using the pack's listed identifier.
Reloading Recipe Tables
If you added the data pack to an existing world or while the session was already running, the new recipe may not immediately show up in crafting tables. Run the /reload command in chat to refresh all world data. The game will pause briefly while reloading loot tables, advancements, and recipes. After the reload completes, open your crafting table to ensure the Totem of Undying recipe is recognized.