Items (especially items used in cooking) are absolutely everywhere in Breath of the Wild, so it makes sense that this category would take some time to complete. For example, other than Korok Seeds, most of the options in the “items” category are empty, including food, herbs and mushrooms. While there are dozens of locations already included on the map, several categories are clearly still under construction. There are 30 different categories to cycle between on Zelda Maps, including memories, sets of armor, Sheikah Towers, Great Fairies, stables and even cracked walls that Link can blow up with bombs.
