Source: https://www.elegantthemes.com/blog/divi-resources/fixing-your-responsive-navigation-menu-in-divi

To display the mobile menu at 1024px instead of 980px.

/* -- START mobile menu breakpoint-- */
@media (max-width: 1024px) {
 #et_mobile_nav_menu {
 display: block;
 }
#top-menu {
 display: none;
 }
 }
/* -- END mobile menu breakpoint-- */Code language: CSS (css)