The Referrer-Policy header lets a server tell the browser how much referrer information to pass on when following links, all the way down to nothing at all if desired. Chrome does respect that, and they also followed other browsers in changing the default to "strict-origin-when-cross-origin" a few years ago which truncates the referrer path when leaving to a different domain, so they only see the domain the visitor came from rather than the specific page like they used to. Can't really fault Google in this case.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Re...