Display content from “About Us” page on the Home Page

If you’re using WP_Query, then assign that page a custom meta key ‘home_content’ with a value as 1. Then use WP_Query’s custom field parameters to loop over it. If you can restrict the title as ‘About’ everywhere, use get_page_by_title, and if you can restrict the slug as ‘about’, use get_page_by_path. These methods will work dynamically.