Activating the Companion Resource Pack
While the data pack adds the functional models and machine drops, the custom creature lore requires the optional companion trivia resource pack. Open the pause or title menu, go to Options, and select Resource Packs. Click Open Pack Folder at the bottom of the screen and put the companion trivia pack into that resourcepacks folder. Return to Minecraft, locate the trivia pack in the Available list on the left, and click its arrow icon to move it to the Selected list on the right. Click Done so the game reloads your resources.
Reading Fun Facts in the Deep Learner
With the resource pack turned on in your settings, you can view custom entries directly on your equipment. Craft or grab one of the added data models—such as the Himmelite, Concussion Creeper, Oretoise, or Magnetron model—and place it inside your Deep Learner. Open your Deep Learner item in the game to view its digital information screen. Alongside the mob's statistics, you will now see fun facts and lore written for that creature. If you see statistics without trivia text, return to Resource Packs in your settings and confirm the companion pack is still active.