Add a Section to top of Event Detail (Use Footer Section)

#1. First, edit Site Footer > Add a Section > Design layout what you want

Here is an example, I will add some contact info to this section

and suppose this is the second section in the Footer

#2. Use this code to Custom CSS box

footer.sections section:nth-child(2) {
  display: none;
}

#3. Use this code to Code Injection – Footer

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.0/jquery.min.js"></script>
<script>
  jQuery(document).ready(function($){
  $('footer.sections section:nth-child(2)').insertBefore('body[class*="type-event"].view-item article>section:first-child');
})
</script>

Result