When the edit button up top is pressed, there are 2 options. Add skill, and Add Lore. The lore one creates a lore skill with an editable line to specify which lore skill it is. I think there are close to 2 dozen or more lore skills possible, with more added in Hellknight Hill and likely each future adventure, as well as any the GM wants to add for their campaign, so hard coding each lore skill would reduce functionality.
Edit: re-reading I think you actually mean the background wasn't adding the proper Lore skill, my mistake.

