schau bitte in deinen htaccess file auf dem Root Directory.
ftp client ( beim manchen muss man erst das Anzeigen der Versteckten Files aktivieren) und mal das .htaccess anschauen, ob dort eventuell was steht, was eine indexieren verhindern kann.

Ps : wie alt ist deine Seite. – Es dauert erfahrungsgemäß ( ohne das man ein aktives scrawlen der Seite in den Google Developer Tools veranlasst ) schon einen Monat mindestens bis das was im index erscheint. Witzigerweise sind es in der Tat Bilder die häufig weit vor dem Content auftauchen in den Suchergebnissen.

Goto Dashboard – Appearance – Menus :
klick one of those littel arrows besides the MenuItem (first red arrow on my screenshot)
Mark the option (second red arrow on my screenshot)

But if I look at your page, you have also not been able to understand the above mentioned.
The one method to put the html code into the input field at Copyright is really a very fast uncomplicated method.
If you have done that – we can give you advice to absoluteley center it in perfection.
________________

i don’t know if you are ready to generate an additional second footer widget area ?
then everything is easy for you (afterwards) you have in enfold then two footer rows.
You can set the first to 2 columns and the last to one column. see here result: https://webers-testseite.de/guenni/

you will have on Enfold Options-Dialog then this:

If you like to know – i can show you how to.

Well : look at google font what is your prefered font there- maybe the font you use on your site.

look here: https://google-webfonts-helper.herokuapp.com/fonts

• only download the zip file –
• unzip the archive
• pick out the svg file. –
• goto fontello page http://fontello.com/
• drag&drop this svg file to the custom icons !!!
• Bingo – select the numbers and letters you like to have. –
• give a name to your new font –
• download from fontello –
• upload to your Import/Export Iconfont Manager

i did it with open sans 800 – thats what fontello made out of it:

Well more userfriendly than a whole code – only to copy and paste into the copyright input field?
Ok – glad we had talking about.

Good luck to you.

Can you have a look to Dashboard – Settings – Reading : Search Engine Visibility if there is a mark – a robots text is set to not index the page.

by the way – you can even use it with shrinking header and on my test page: Link
i placed the now the same image in background-position : fixed – nice effect.

if it is only an image ( without content and other dynamic stuff)
you can simply add an image via pseudo-element: ( in my case it is page-id-3041)
the height you choose for that must be in addition to the normal main: padding-top value
(my testpage has a header-height of 130px + 250px = 380px

.page-id-3041  #header_meta:after {
  content: "";
  background-image: url(/wp-content/uploads/macro.jpg);
  background-repeat: no-repeat;
  background-size: cover;
  width: 100vw;
  height: 250px;
  position: relative;
  left: 0;
  bottom: 0;
}

.page-id-3041 #header_meta {
  display: grid;
}

.html_header_top.html_header_sticky #top.page-id-3041 #wrap_all #main {
    padding-top: 380px;
}

since it is part of header_meta, the height has already been taken into account by avia-snippet-sticky-header.js script:
topbar_height = header.find('#header_meta').outerHeight(),

see result here: https://webers-testseite.de/datenschutzerklaerung/

This is still working even with Enfold 4.6. : https://kriesi.at/support/topic/social-bookmarks-widget-how-to/. – do not forget the css code!
If it is too much. there are possibilities to make it manually.

For Masonry Gallery – try this in child-theme functions.php:

if(!function_exists('avia_change_posts_query')){
	function avia_change_posts_query($query, $params){
	    if(!empty($query['orderby']) && $query['orderby'] == 'post__in'){
                   $query['order'] = 'ASC';
                   $query['orderby'] = 'title';
	    }
	    return $query;
	}
add_filter('avia_masonry_entries_query', 'avia_change_posts_query', 10, 2);
}

ASC ( from A to Z )
DESC ( from Z to A )

Even a preview image ( youtube thumbnail ) is against GDPR (DSGVO) – only if you are willing to download those images and present self-hosted is a safe way.
By the way – Borlabs Cookie (vers.2) has that option to show thumbnail by downloading the files to host it yourself.

first try this in quick css:

@media screen and (min-width:768px) { 
  #footer .widget {
    overflow:visible !important;
  }  
  #text-4 div > img {
      position: relative;
      left: calc(50% + 25px);
      overflow: visible !important;
  }
}

But has the disadvantage that on responsive case the sign is inbetween the two blocks.

__________________
Alternative:

another quick and dirty way ( because all your background-color on #footer and #socket are equal) could be to insert the image to the copyright info field:
delete the image from your widget area.

put this to your copyright input field of Enfold Options:

<img class="aligncenter" src="https://www.moneyprodigy.com/wp-content/uploads/2017/01/Certification-for-Footer-transparent.png" alt="" width="300" height="211" /><br>© Copyright - Money Prodigy <a href="/terms">Terms</a> & <a href="/privacy-policy">Privacy Policy</a> [nolink]

Advantage is that in responsive case the sign is under all widgets – just over your copyright info.