This is the first .gov website I've seen that does not list any sort of agency, branch of government, commission, whatever, that's behind it.
Yes, I see the National Design Studio built it -- but presumably they aren't the ones writing nutritional guidance. Is this FDA? HHS?
Nutritional guidelines are developed by USDA.
This newest iteration appears to have had input from HHS under RFK Jr: https://www.nbcnews.com/health/health-news/us-dietary-guidel...