Rice Cooker Risotto

Name: Rice Cooker Risotto
Ingredients: 2 medium shallots, finely chopped; 4 garlic cloves, finely grated; 1½ cups arborio rice; ½ cup dry white wine; 3–4 cups low-sodium vegetable broth, divided; 8 Tbsp. (1 stick) unsalted butter, divided; 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt, plus more; ½ tsp. freshly ground pepper, plus more; Zest and juice of 1 lemon; 1 cup frozen peas; 2 oz. Parmesan, finely grated (about 1 cup); plus more for serving (optional); Mint leaves and extra-virgin olive oil (for serving; optional)