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.

• 31117 Primo Shape Sorter Chamber Door, Square Opening Pair of this part
• 31118 Primo Shape Sorter Chamber Door, Circular Opening Pair of this part
• 31119 Primo Shape Sorter Chamber Door, Triangular Opening Pair of this part