Edit Board can export a board and its sub pages to Final Cut Pro XML 1.9.
There are four possible workflows depending on how you want to work with your media. See Linking Edit Board to Final Cut Pro for how to configure your board correctly for each one.
If you have a board containing many nested pages Edit Board always exports the current page that you are on as well as all of it's sub-pages.
From the Export menu at the top of every board select Final Cut Pro then select export.