How can I create a custom Gutenberg block with dynamic content?

<!-- BEGIN COPY / PASTE -->
    // Register a dynamic block
    function my_dynamic_block_register() {
      register_block_type('my-plugin/dynamic-block', array(
        'render_callback' => 'my_dynamic_block_render',
      ));
    }
    add_action('init', 'my_dynamic_block_register');

    // Server-side rendering function
    function my_dynamic_block_render($attributes) {
      $dynamic_content = get_option('my_dynamic_content_option');
      return '<div class="my-dynamic-block">' . esc_html($dynamic_content) . '</div>';
    }
    <!-- END COPY / PASTE -->