I have added the HTML for the tabs to my test site online - I added the address above.
Using the tab code listed below in module position "Section 3". At the moment it will not work. But adding this :
<script src="/media/vendor/bootstrap/js/tab.min.js" type="module"></script>
It will work.
The code for tabs is:
<ul class="nav nav-tabs" role="tablist">
<li class="nav-item"><a href="#nagtermine" class="nav-link active" data-bs-toggle="tab">Termine/Events</a></li>
<li class="nav-item"><a href="#nagevents" class="nav-link" data-bs-toggle="tab">Dokumente</a></li>
</ul>
<div class="tab-content"> <!-- Tab container -->
<div id="nagtermine" class="tab-pane active"> <!-- First Tab info -->
content of first tab
</div> <!-- end of first tab -->
<div id="nagevents" class="tab-pane fade"> <!-- second Tab info -->
content of second tab
</div> <!-- end of second tab -->
</div> <!-- Close Tab container -->