I saw that. But I have to do it all by hand and also customize the CSS by Hand.
Why is it not possible with a Pagebuilder (for example Elementor/BeaverB) to move a Section or Widget in the Site-Header? Is there something special with Site-Header?
It provides the template shortcode function that is only available with Elementor Pro. Then you can add your Elementor content to the header widget or using GP Hooks Element.