Insert Text Under Every Blog Post

function add_custom_text_under_post($content) {
    if(is_single()) {
        $custom_text = '<p><strong>Did You Enjoy This Article?</strong><br>Please consider sharing it with others! Your support means a lot to us and helps spread valuable information and insights.</p>';
        $content .= $custom_text;
    }
    return $content;
}