Preheat the oven to 450° F. Cut and discard the ends of the squash. Cut it in half lengthwise then cut ¼-inch thick slices crosswise. Toss squash pieces with olive oil on a baking sheet, arrange in a single layer, and roast until tender when pierced with a fork, about 15 - 20 minutes.
Boil the ramen noodles according to package directions and set aside.
For the sauce, whisk together the water, miso paste, soy sauce, and honey and set aside.
Discard the root ends of the bok choy and roughly chop the remaining leaves and stems.
In a large bowl, use your hands to combine the pork, crumbled nori, breadcrumbs, half the white bottoms of the green onions, half the ginger, sesame seeds, salt, and pepper. Form into about 24 equal-sized meatballs.
In a large pan with high sides (or a pot), heat 1 tablespoon olive oil on medium-high heat. Add the meatballs and brown on all sides until cooked all the way through, about 6 - 8 minutes.
Stir in the remaining ginger and white parts of the green onions for about 1 minute. Whisk in the sauce ingredients along with 2 cups of water and the bok choy. Simmer on medium-low, stirring occasionally, until thoroughly combined and the bok choy has wilted, 4 - 6 minutes.
Divide the ramen noodles among 4 or 5 bowls. Top with meatballs, sauce, and veggies (including the squash). Garnish with remaining green parts of the green onions and serve warm.