Aah ok – right don’t use <a> tags to jump to instead edit the Section or widget that you want to jump to in elementor and in the Advance Settings > ID field add your id there e.g 'about'
You need to remove the ID from the heading widget and add it to the Section itself, then the menu link will jump to the top of it section. Or you could add it to the spacer widget. Just not on the heading itself.