I create now the structure for the static vertical menu manually with html.
<div class="footer-links">
<strong><a class="footer-link" href="./de/xxx/">XXX</a> </strong>
<a class="footer-link" href="/./de/xxx">XXX</a>
<a class="footer-link" href="/./de/xxxx">XXX</a>
</div>
I discovered something new for gutenberg:
https://de.wordpress.org/plugins/reusable-gutenberg-blocks-widget/
With this plugin I could display a saved reusable block from gutenberg anywhere via widget. Very cool idea. No more need for elementor and the other “great builders”.