Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 85043 Creature Body Part, Rock Monster King Head [Complete Assembly] this part is a sub-part of it
• 85045c01pr0001 Creature Body Part, Rock Monster King Jaw Upper with Trans-Neon Green Teeth and Black and Red Eyes Print Pair of this part