Earlier quoted context omitted.
I don't think the USDS makes all or even most of the current federal gov websites.
No, they don't. But they did create the VA site: https://www.usds.gov/projects/va-dot-gov And they're involved with the Department of Education, although I couldn't find out exactly what they built.
They did help change over the old va.gov to the new va.gov (which was built as vets.gov), which imo has been a huge improvement.
(There are still many, many problems with the VA and its website. Just saying that 1. the new va.gov is a big improvement and 2. the USDS is far from being a single point of responsibility for it, or even _the_ major point of responsibility)