Show SEO Title in the frontend

Hello,

I’m trying to show SEO title in the frontpage.
Tried this:

function page_title_sc(){
    
    $yoast_title = get_post_meta(get_queried_object_id(), '_yoast_wpseo_title', true);
    $title = strstr($yoast_title, '%%', true);
    if (empty($title)) {
        $title = get_the_title(get_queried_object_id());
    }
    $wpseo_titles = get_option('wpseo_titles');

    $sep_options = WPSEO_Option_Titles::get_instance()->get_separator_options();
    if (isset($wpseo_titles['separator']) && isset($sep_options[$wpseo_titles['separator']])) {
        $sep = $sep_options[$wpseo_titles['separator']];
    } else {
        $sep = '-';
    }

    $site_title = get_bloginfo('name');

    $meta_title = $title . ' ' . $sep . ' ' . $site_title;

    echo $meta_title;
}

add_shortcode( 'page_title', 'page_title_sc' );

It returns Page title for every single page.

Tried this too:

function yoastVariableToTitle($post_id) {
    $yoast_title = get_post_meta($post_id, '_yoast_wpseo_title', true);
    $title = strstr($yoast_title, '%%', true);
    if (empty($title)) {
        $title = get_the_title($post_id);
    }
    return $title;
}
// added this line below to show shortcode
add_shortcode( 'product_seo_title', 'yoastVariableToTitle' );

Same thing happens.

Could you help me? ??