https://webkit.org/status/ has been retired, so any links to it from other places in the https://webkit.org/ and https://docs.webkit.org/ sites should probably be removed or changed. One such prominent link is at the top of the https://webkit.org/ page itself, in the second sentence — the “check feature status” hypertext in “Web developers can follow development, check feature status, download Safari Technology Preview to try out the latest web technologies, and report bugs”. Another is the “WebKit Feature Status” link in https://webkit.org/sitemap/ (the last item in the Home section). Another is the “Feature Status” section at https://docs.webkit.org/#feature-status.