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

<!-- BEGIN COPY / PASTE -->
    // JavaScript: Register the block
    wp.blocks.registerBlockType('my-plugin/dynamic-block', {
      title: 'Dynamic Block',
      icon: 'smiley',
      category: 'widgets',
      edit: function() {
        return wp.element.createElement('p', null, 'Dynamic Content Block');
      },
      save: function() {
        return null; // Server-side rendering
      }
    });

    // PHP: Render the block with dynamic content
    function render_dynamic_block() {
      $dynamic_content = get_dynamic_data(); // Custom function to fetch data
      return '<div>' . esc_html($dynamic_content) . '</div>';
    }
    register_block_type('my-plugin/dynamic-block', array(
      'render_callback' => 'render_dynamic_block',
    ));
    <!-- END COPY / PASTE -->