As far as I can tell, the america.gov LLM is mostly providing links to the landing pages you would have found through classical web search. Perhaps with a little bit of clarifying information when there are multiple choices.

Honestly, using an LLM the way america.gov does it, is pretty much the same thing as using search engines, except the result you wanted is almost always in the first result, not 2/3 of the way down the 4th page. Or 42nd on a list of things you are not interested in at all. So much more efficient!