Remove pork from marinade and discard the marinade. Spray instant pot insert with cooking spray and set on the sauté function. Add the oil and let heat. Add the pork and brown on all sides.

Add chicken broth, water, mirin, and dashi powder. Cook on high pressure for 45 minutes then let naturally release. Remove pork and shred with two forks.

To the broth, add the vinegar ,tamari, fish sauce, chili garlic sauce, and pepper. Set the instant pot to sauté and simmer for 5 minutes.

Cook the ramen noodles per the package directions.

Divide noodles among 4 serving bowls. Cover with broth, add the pork and serve with pickled eggs, halved, pickled vegetables, pickled mushrooms, bok choy, chili oil, green onions, and sesame seeds.