To use your layouts on a page, first create a new page or open an existing one and ensure the Divi builder is active.
Next, click Load From Library in the Divi Builder Bar.
Click Add From Library to display your layouts, then click Load next to the layout you wish to load onto your page. Be sure to un-check the Replace existing content with loaded layout box if you want to retain any content you already have on your page.
Your layout is now loaded onto your page.