This is an example of the specific display content when you set up the mobile hamburger menu of the Shopify theme "Dawn" to display any HTML before and after the menu list. Login buttons and submenus are common examples.
Dawn theme with a custom Liquid section in the header to display more than just the menu list in the mobile hamburger menu
[How to set it up: Add an element above the menu list] Add a "Customized Liquid" section to the header group and insert the code.
[How to set it up: Add an element below the menu list] Add a second "Customized Liquid" section to the header group and insert the code.
