Need to search specific content in flexible content

Hi there,

I need to search for specific content from the regular page! Most of my pages are using flexible content and inside Wysiwyg Editor!

I can’t make it happen to display results in the search page, the closest article to my issue i found is this https://wordpress.stackexchange.com/questions/332605/query-pages-for-use-of-a-flexible-content-layout

When i use code suggested above, it displays pages where the layout is used!

<?php
    $flex_content_name = 'services';  
    $layout_name = 'photo_with_text'; 
    $args = array(
        'posts_per_page'    => -1,
        'post_type'     => 'page',
        'meta_query'    => array(
            array(
                'key'       => $flex_content_name,
                'value'     => '"'.$layout_name.'"',
                'compare'   => 'LIKE'
            )
        )
    );

    $the_query = new WP_Query( $args );
?>

I’m not sure where do i add my subfield name?

Did anybody come across a similar issue and have any suggestions?
Thanks in adavnce