How to read Space Sidebar
Step 1 When inside a Confluence space, press Insert + F7 to select the list of links.
Step 2 Then select the link Sidebar. If that is not available, press Ctrl + Insert + L and select the option called Pagesblog related to the side bar.
Step 3 Press Enter to focus on the sidebar. Then use the "Tab + Shift + Tab" key combinations to traverse through the sidebar items. Listen for the appropriate instructions that explain expanding the page hierarchy.