add box after author box single post

add_action( 'jnews_single_post_after_content', 'blow_author_box', 31 );

function blow_author_box() {
    $content =
    ' <div style="border: 2px solid #006400; background-color: #f0fff0; color: #228b22; padding: 10px; border-radius: 0; font-family: Arial, sans-serif;">
    <p><strong>DigitalBarry</strong> is all about honest content—no ads, affiliate marketing, or clickbait. We focus on delivering quality journalism that respects your time and intelligence. If you’d like to support our efforts in keeping the site ad-free, we’d be grateful. Thank you for your trust and support!</p>
    </div>';
    echo $content;
}