May I first say that your main navigation is very confusing; due to a lack of space, a second row is opened – and the contrast is suboptimal if you want it that way;)
My recommendation for your site would therefore be to always use the hamburger menu – even with large screen widths.

How would you like the search to be displayed in the burger menu?
Only as a magnifying glass – or already as an input field?
See: https://pureinstall.webers-testseite.de/

Possible to do both (see link)

make your screen width small to see the hamburger active …

first: have a look at: https://webers-testseite.de/divider-on-sliders/

… next – soon

OK – but it looks good to me
What do you like to change on that?

But apart from that, I think the days of tables are outdated. You can see from the examples of Enfold demos that responsive implementation will always remain problematic. This is always particularly noticeable with large tables like yours. Smaller tables up to 4 columns still work somehow, but after that it only remains clear on large screens.

On your example page ( https://colorlib.com/etc/tb/Table_Fixed_Header/index.html ) you can see that responsiveness is not implemented at all and that you have to scroll horizontally.

thanks: didn’t know about that extra filter in portfolio registration

did you try
for ajax search ( thats the menu search) :

function avf_ajax_search_query_mod( $search_parameters ){
  $defaults = array(
    'numberposts' => 5, 
    'post_type' => array( 'page', 'post' ), 
    'post_status' => 'publish', 
    'post_password' => '', 
    'suppress_filters' => false
  );
  $_REQUEST['s'] = apply_filters( 'get_search_query', $_REQUEST['s']);
  $search_parameters = array_merge( $defaults, $_REQUEST );
  return $search_parameters;
}
add_filter('avf_ajax_search_query', 'avf_ajax_search_query_mod', 10, 1);

and in addition for search resultspage :

function post_types_for_search_results($query) {
  if ( !$query->is_admin && $query->is_search) {
    $query->set('post_type', array('page','post') );
    $query->set('post_status', array( 'publish' ) );
  }
  return $query;
}
add_filter( 'pre_get_posts', 'post_types_for_search_results' );

In this case, your code snippet would be unnecessary.
btw: because of new cpt support in enfold – there is a similar filter for any other cpt: avf_custom_elements_cpt_args – maybe it is possible to use it for specific post-types ( portfolio, product, etc. to have that analog to your code snippet.

here is the code i use for google recaptcha:

function prohibit_google_recaptcha( $prohibited ){
  global $post;
  if( ! $post instanceof WP_Post ){ return $prohibited; }
  
  $content = Avia_Builder()->get_post_content( $post->ID );
  $prohibited = ( false !== strpos( $content, '[contact-form-7 ' ) || false !== strpos( $content, '[av_contact ' ) ) ? false : true;
  
  return $prohibited;
}
add_filter( 'avf_load_google_recaptcha_api_prohibited', 'prohibit_google_recaptcha', 10, 1 );

so – only if contact-form-7 or enfold contact shortcode is found the recaptcha is loaded.

But the idea would be worth considering.
To see which enfold shortcodes are used on the page and then only load these scripts/styles.
I don’t know whether there is a performance gain, because this check also takes time.

In the examples mentioned above, it is not a problem because a contact form only needs its scripts after the form has been filled in. The same applies to a ReCaptcha.

can you post your code snippet that you used on portfolio?
a portfolio is nothing else than a custom post type as woocommerce products too.

i only do know that there is an include snippet – all posttypes that are not listet ( as: product ) are then excluded

function exclude_from_search($query) {
  if ( !$query->is_admin && $query->is_search) {
     // include the posttype that should be included to search results
    $query->set('post_type', array('page', 'post', 'portfolio') );
  }
  return $query;
}
add_filter( 'pre_get_posts', 'exclude_from_search' );

if you do not like the portfolios – just remove it from array

btw. the ajax search has its own query ! If you like to influence this too …

Yes – and if you use for both logo svg files you can replace it by the ID of that logo file.
you can find that ID on media library list view! ( it is an own column for that )

try for default logo:

function change_logo_on_different_languages($logo){
    $currentlang = get_bloginfo('language');
    if($currentlang == "fr_FR"){
        // see on media library what ID your Logo for Fr site has.
        $logo = 162;  
    }
    return $logo; 
}
add_filter('avf_logo','change_logo_on_different_languages');

and for transparency logo:

function av_change_alternative_logo_img($header){
    $currentlang = get_bloginfo('language');
    if($currentlang == "fr_FR"){
        // next line is only neccessary if on options no default transparency logo has been set
        $header['header_class'] .= ' av_alternate_logo_active'; 
        $header['header_replacement_logo_id'] = 163;
    }
    return $header; 
}
add_filter('avf_header_setting_filter','av_change_alternative_logo_img');

or adjust Ismaels code that way with ID’s

send me an email – info under my nick

on my example page there is now both code for sortable and “fixed” table header with tbody scroll.

https://webers-testseite.de/sortable-table/

on the bottom of that page there is the example table styled layouted by Grid Layout !
this had to be only for wider screens – on responsive case all tables are ugly;

Sorry, I really tried to go through your decision tree, but there are quite a few logic errors in the conditional fields. Big disadvantage of the plugin is that there is only an and logic – no or – that would make things easier.

I’m getting out now – if what I’ve achieved on the example page is enough for you – I’ll post the codes here.

What do you mean by 2steps ?
This is the complete content of Formbuilder – isn’t it?

First view shows me a value Avanti – that has not a field to prove!

On the whole conditional fields these “Avanti” check has no field to prove.

And doesn’t it seem strange to you that almost all virus scanners(1/66), even very well-known ones, find nothing – only one of them gives an alarm?
i suppose it has to be a false positive result. BitDefender, McAfee, Eset, Kaspersky, Symantec etc. all highly recommended Scanners find nothing !
Who is VirIt ?

My local scanners (Eset Smart Security Premium for PC and GData Antivirus on Mac OSX) do not find any suspicious files.

try : https://kriesi.at/support/topic/sliders/#post-1463446

try on child-theme functions.php:

function change_slide_options($default){
		$default['hoverpause'] = true ;
  return $default;
}
add_filter('avf_avia_slideshow_defaults','change_slide_options', 10, 1);