How to get the index of the wp-each directive in Interactivity API Wordpress?

I am learning interactivity API and when I tried wp-each directive, I noticed that there is no way to get the index of the array. e.g. If this is my array

$config = [
  'fruits' => [
    [
      'id'   => time() * 1000,
      'data' => [
        'apple'    => 10,
        'orange'   => 10,
        'banana'   => 10,
      ],
    ],
  ],
];

and this my HTML

render.php

  <ul data-wp-interactive="myNameSpace"
      class="gap-2 grid"
       <?php echo wp_interactivity_data_wp_context( $config ) ?>
      >
    <template data-wp-each="context.fruits"
              data-wp-key="context.item.id">
      <li class="p-2 border border-slate-100 rounded-md"
          data-wp-bind--id="context.item.id">
        <span data-wp-text="context.index"></span>
      </li>
    </template>
  </ul>

I checked the documentation and it does not include anything related to index.