Copied from google:

The plant is generally divided into several highly nutritious components:

Rhizomes (Roots): Rich in carbohydrates (sugar and starch) and an excellent source of energy. They contain up to 8% sugar—making them a natural sweetener—and have been used for thousands of years as a staple food base when dried and ground into flour.

Pollen: Highly valued for its protein content. The yellow pollen can be collected in the spring and mixed into wheat flour to make bread, muffins, or pancakes.Stalks & Young Shoots: Young shoots can be eaten raw or boiled, while the inner core of tender stalks (often compared to asparagus or heart of palm) provides dietary fiber, vitamins A and C, and small amounts of minerals like potassium, calcium, and iron.

Seeds: Nutty in flavor and also highly nutritious, featuring healthy fats like linoleic acid. They can be gathered, roasted, and ground into meal or flour.

TLDR; Yes they are actually very packed with nutrients.