Bring a pot of water to a boil. When boiling, add the noodles and simmer for 3 minutes. Strain and rinse with cold water. Toss with just a little oil if necessary to keep them from sticking (mine already had a little oil on them, so I didn't need to). Set aside.
(If using another type of noodle, follow package instructions)
To Prepare Soup:
Add all ingredients except for noodles and bok choy to instant pot. Set to manual, high pressure for 8 minutes. It will take about 10 minutes to come to pressure. After cooking, use the quick release to release pressure. Open pot and stir in bok choy. Allow bok choy to cook in the hot soup for 2-3 minutes.
Meanwhile, remove the chicken and shred it with two forks. Add it back to the broth and serve.
To Serve The Ramen:
In a bowl, place a serving of noodles, then pour the soup over them. Top soup with ramen egg, sliced green onions, cilantro and sesame seeds if desired.
I loved the broth as is, but if you find the broth too salty, add 1-2 cups of water.