Hello, @Farhad,
Unfortunately, this is not possible to show the All Department Menu on the mobile version, as the element is only for the Desktop header version and not on mobile, so for now this requires extra Customization and additional customization is outside the scope of our support.
Also, you can send a request about adding the element for the mobile header version to our Feature requests list – https://www.8theme.com/taskboard/
Regards 8Themes Team.