Instant Pot Lowcountry Seafood Feast

Name: Instant Pot Lowcountry Seafood Feast
Ingredients: 1 (12 ounce) bottle light beer or lager beer; 8 ounces red baby potatoes, unpeeled and halved; 8 ounces smoked turkey sausage, sliced into 1-inch pieces; 2 ears fresh corn, shucked and cut crosswise into quarters; ½ teaspoon kosher salt; 2 tablespoons salt-free Creole seasoning (such as Tony Chachere's), divided; 4 teaspoons chopped garlic, divided; 1 pound medium unpeeled raw shrimp, tail-on; 3 tablespoons unsalted butter; 3 tablespoons fresh lemon juice (from 1 lemon); 2 tablespoons chopped fresh flat-leaf parsley; Lemon wedges (optional)