Add the apple cider, Worcestershire, cinnamon stick, and bay leaf to the Instant Pot. Set the trivet inside and place the ham on top.
Mix the brown sugar, cinnamon, nutmeg, cloves, ginger, and paprika in a small bowl. Set aside.
Cook on high pressure for 5 minutes, then let the pressure release naturally. With only 1 cup of liquid, it should not take long.
While the ham warms, line a sheet pan with foil and add a second loose sheet of foil on top. That extra piece helps keep the sugar mixture contained while you coat the ham.
When the pin drops, carefully move the ham to the pan. Since it is boneless, just keep a steady hand in case the spiral cut is a little wonky.
Prepare the glaze packet according to package directions, then brush or spoon it over the ham. No packet? Use the juices from the pot.
Cover the ham generously with the brown sugar spice mixture. Lift the top foil as needed to catch the excess and help coat the sides.
Broil on high on the bottom rack for 5 to 10 minutes, until the crust is darkened and caramelized. Do not walk away.
Serve right away, or slice the ham and set it back in the warm juices with the crust side up to keep it extra juicy.