Add the chicken broth and water to a large stockpot. Add three scallions that have been cut into 2β long pieces. Cut the 4th scallion into thin slices and set aside (this will be for garnishing the soup). Bring the broth to a simmer and cook while you prepare the meatballs and other ingredients.
To a small nonstick skillet, add in the avocado oil and the garlic cloves that have been minced. You do not need to heat the pan before adding the garlic. Adding the garlic to the hot pan and oil will cause it to brown too quickly.
Turn the heat on medium-low and stir the mixture until the garlic turns brown and toasty. Watch the garlic carefully and remove it from the heat and stir it if you think it is browning too quickly. Once browned, pour it into another dish to stop the cooking. Reserve this pan for cooking the omelette.
Prepare the eggs by whisking the eggs together in a bowl with 1 tsp fish sauce and β tsp ground white pepper.
To a medium-sized mixing bowl, add the ground pork, 1 Β½ tbsp fish sauce, and ΒΌ tsp ground white pepper. Mix well for a couple of minutes until the ground meat mixture starts to resist being mixed. This texture will hold the meatballs together.
Drop the meatballs into the soup using a 1 oz cookie scoop or by taking two spoons to form the meatball. Simmer until the meatballs are fully cooked for up to 10 minutes.
While the meatballs are cooking, use the skillet you used to cook the garlic oil. There should be some residual oil in the pan. Heat the pan until hot over medium-high heat. Once hot, add in the egg mixture. Allow the egg to cook some, and then take a spatula to lift the sides and let the runny egg sitting on the top run to the bottom. Repeat this process until the egg is cooked enough to flip. Cut the egg in half, so it is easier to flip. Flip it and cook it on the other side until browned slightly.
Transfer the omelette to a cutting board and cut into small pieces about 1β x 1β. Add them to the soup and cook until heated through about 2-3 minutes. Serve the soup hot with sliced scallions on top.