Certain content blocks are not available within the footer. To see what content blocks are available:
1. Access your Footer under the Content tab (Footer is available under the Global Content sidebar on the right). Here, you can edit your Footer with content blocks, as well as remove/delete blocks.
2. Click on the green plus sign to see all of the content blocks available in the Footer.
Note: Custom content and items can be added to the Footer with the help of a developer or designer. Give us a call or send a support ticket to discuss further.