8 – How to display the rendered entity of a store in a code?

I have created a small module to display an “Agree to Terms” link in the Drupal Commerce shopping tunnel.
This link displays the store’s condition page.
I want to display the rendered store entity instead of the conditions page. How to do this ?
I created in my type of store, a display named “Terms and conditions”. I want to make this display in a modal window when the user clicks on the link.

Here is my code :

https://git.drupalcode.org/sandbox/zenimagine-3082137

<?php

namespace Drupalcommerce_marketplace_terms_and_conditionsPluginCommerceCheckoutPane;

use DrupalComponentSerializationJson;
use DrupalCoreFormFormStateInterface;
use Drupalcommerce_checkoutPluginCommerceCheckoutPaneCheckoutPaneBase;
use Drupalcommerce_checkoutPluginCommerceCheckoutPaneCheckoutPaneInterface;
use DrupalCoreLink;
use DrupalCoreUrl;

/**
 * Provides the completion message pane.
 *
 * @CommerceCheckoutPane(
 *   id = "marketplace_terms_and_conditions",
 *   label = @Translation("Marketplace Terms and Conditions"),
 *   default_step = "review",
 * )
 */
class MarketplaceTermsAndConditions extends CheckoutPaneBase implements CheckoutPaneInterface {

  /**
   * {@inheritdoc}
   */
  public function buildPaneForm(array $pane_form, FormStateInterface $form_state, array &$complete_form) {
    $store_name = $this->order->getStore()->getName();
    $store_id = $this->order->getStoreId();
    $pane_form('#attached')('library')() = 'core/drupal.dialog.ajax';
    $attributes = (
      'attributes' => (
        'class' => 'use-ajax',
        'data-dialog-type' => 'modal',
        'data-dialog-options' => Json::encode((
          'width' => 'auto'
        )),
      ),
    );
    $link = Link::fromTextAndUrl(
      $this->t('terms and conditions of the store "@store_name"', ('@store_name' => $store_name)),
      Url::fromUri("internal:/store/$store_id/cgv", $attributes)
    )->toString();
    $pane_form('marketplace_terms_and_conditions') = (
      '#type' => 'checkbox',
      '#default_value' => FALSE,
      '#title' => $this->t('I have read and accept @terms.', ('@terms' => $link)),
      '#required' => TRUE,
      '#weight' => $this->getWeight(),
    );
    return $pane_form;
  }

}