Beyond federal websites (.gov, .mil) there are lot of gov contractor websites that are being taken down (presumably at the demand of agencies) that contain a wealth of information and years of project research.
Some below of contractors that work with US AID:
- https://www.edu-links.org/ (taken down)
- https://www.genderlinks.org/ (taken down)
- https://usaidlearninglab.org/ (taken down)
- https://agrilinks.org/ (presumably at risk)
- https://www.climatelinks.org/ (presumably at risk)
- https://biodiversitylinks.org/ (presumably at risk)