Hello,

Please add the following Custom CSS code to Theme Settings > Custom CSS > Global Custom CSS. Change the value as per your requirements. Also sub menus edges are showing in sharp edges.

.wd-dropdown-menu.wd-design-sized:not(.wd-scroll), .wd-dropdown-menu.wd-design-sized.wd-scroll .wd-dropdown-inner {
    left: 0px !important;
}

Best Regards