Place Kaffir Lime Leaves, Lemongrass, Chili Pepper, and Ginger into empty loose leaf tea bag (pouch). This pouch will be removed from soup when soup is done cooking.
Open Instant Pot. Add in Vegetables: Tomatoes, Mushrooms, and Onion into the liner.
Add, Chicken/Tofu, Sugar, Fish Sauce, Coconut Milk and pouch.
Close Instant Pot. Set Manual for 5 minutes.
When done, do a quick release AFTER 5 minutes.
Add Lemon Juice to soup before serving.