Currently the internal AppleWin build is not being run and may or may not actually work. There's a refactoring of CMake happening in https://bugs.webkit.org/show_bug.cgi?id=196704 which will impact an AppleWin internal build. In https://bugs.webkit.org/show_bug.cgi?id=196792 I had a patch that would hopefully work for the internal AppleWin build but I don't have a way to test things. Considering the current state of the AppleWin internal build and the fact that no bots are running I'm splitting the patch. I will support anyone who wants to get things running within Apple but I don't want to slow down the momentum for this refactor.
AppleWin port was removed.