Offcanvas "Offset" - Affect only the body of the website and not the header

Is there any way to make the Offcanvas “offset” option affect only the body of the site but not the header it is contained in?

Currently when “Offset” option is enabled, it offsets the body and the header of the site.
I have found that offsetting the header is not great for usability and the user experience suffers from the movement of the header/main menu

What I am aiming to recreate is the following behaviour:

evoltsidemenu2