in appearance → menus
go to screen options and enable css classes:
[image: 1677768614573-screenshot-2023-03-02-at-15.49.32-resized.png]
then add a css class to your menupoint like: scrollup
then add this JS to lay options → custom html & css → custom <head> content :
jQuery(document).on("click", ".scrollup", function(e){
e.stopPropagation();
e.preventDefault();
jQuery('html, body').animate({scrollTop: 0}, 600, 'easeOutQuint');
})
