Change Post Per Page for Specific Page || 404 page

/* Change Post Per Page for Specific Page || 404 page */
function change_attr_404_page( $attr, $name, $id ) {
    if( 'jnews_404_' === $name ) {
        $post_per_page = 5; /* Show post per page */
        $attr['pagination_number_post'] = $post_per_page;
        $attr['number_post'] = $post_per_page;
    }

    return $attr;
}
add_filter( 'jnews_get_content_attr', 'change_attr_404_page', 10, 3 );