The featured image is not shown when adding the post link on FluentCommunity or any social platform

og:image

function add_open_graph_tags() {
    if (is_single() || is_page()) {
        global $post;
        $featured_image = get_the_post_thumbnail_url($post->ID, 'full');
        $default_image = 'https://verenakrone.de/path-to-default-image.jpg'; // Replace with your default image URL
        ?>
        <meta property="og:title" content="<?php echo get_the_title(); ?>" />
        <meta property="og:description" content="<?php echo get_the_excerpt(); ?>" />
        <meta property="og:image" content="<?php echo $featured_image ? $featured_image : $default_image; ?>" />
        <meta property="og:url" content="<?php echo get_permalink(); ?>" />
        <meta property="og:type" content="article" />
        <?php
    }
}
add_action('wp_head', 'add_open_graph_tags');