Use a knife or vegetable peeler to peel the lemon. Try to include as little of the white layer of the peel as possible. Then, slice the oranges.
Place the orange slices, lemon zest, red wine, maple syrup, bourbon, cloves, star anise and cinnamon sticks in your Instant Pot and stir.
Use the SAUTE setting to gently heat up the mulled wine. You don't want the wine to boil, only gently simmer or simply become warm.
Allow the spices to mull in the warm wine for at least 5 minutes, or up to 1 hour. The longer you leave the wine, the deeper the spice flavor will become.
Remove the whole spices, oranges, and lemon peel. I like to use a fine mesh strainer for this purpose.
Serve the warm spiced wine in cups, optionally garnished with fresh orange slices, cranberries, cinnamon sticks or fresh rosemary sprigs.