It would be helpful to have an option in the Nav Menu element to show all the sub-nav elements, like a typical footer menu.
I use custom CSS for this, but an option would be much cleaner and future-proof.
My current custom CSS solution: https://forum.bricksbuilder.io/t/how-to-show-full-nav-menu-show-sub-menu-items-to-make-typical-footer-navigation/13157