While the chuck roast is searing, add the tamari, miso, maple syrup, rice vinegar, ginger and garlic to a small bowl or jar and stir until combined. Briefly remove the fully seared chuck roast from the instant pot and drain off any excess grease. Add the chuck roast back to the pot along with the miso mixture and beef broth.
⅓ cup tamari, 3 tbsp white miso paste, 3 tbsp maple syrup, 1 tbsp rice vinegar, ½ tbsp fresh minced ginger, 4 garlic cloves, 1 cup beef broth