DAP uses Google Analytics 360 to measure traffic and engagement across thousands of federal government websites and apps, reporting analytics under a single federal-wide shared account. Google Analytics 360 is the paid, enterprise version of Google Analytics 4 (GA4).

- https://digital.gov/guides/dap/

DAP is what the government is using, according to the Github post / page. And it's important and equally interesting to know what the stats on the Github page exclude to present the data: https://github.com/CodebergIsBetter/platform-share-usa-gov/blob/main/analysis/os_filter.json (I love transparency)