I am not following, you will need to elaborate.
you have several types of menu.
regular menu bar that changes into a slide open menu on mobile.
Vertical accordion menu, that expands submenus inside the vertical menu
Simple horizontal that don’t change to mobile
Simple vertical that don’t expand.
Which one are you after?
FYI you can insert any of these in a sidebar by putting an extra menu shortcode with the proper options in a text widget