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.

• 31023 Duplo Door 1 x 4 x 4 with Four Panes, Different Size and Curved Top this part is a print of it
• 6360 Duplo Building Door Frame / Entryway 4 x 4 x 5 this part is a pair of it
• 92094 Duplo Door Frame 2 x 4 x 5 this part is a pair of it