Add trivet to pot, along with apple cider, Worcestershire sauce, cinnamon stick, and bay leaf. Place ham on top of trivet and cover with half of the included glaze packet. If there is no packet, you can skip this step.
Transfer ham to a cutting board and cover evenly with brown sugar. Move ham back to pot, lock lid, and cook at high pressure for 5 minutes.
Once cook time is complete, allow pressure to release naturally.
Pour remaining contents of glaze packet over ham. And/or baste ham with juices at the bottom of the pot.