Steps to reproduce the issue

Check the file: components/com_finder/tmpl/search/default.php

There is that code:

<?php if ($this->params->get('show_search_form', 1)) : ?>
      <div id="search-form" class="com-finder__form">
	      <?php echo $this->loadTemplate('form'); ?>
      </div>
<?php endif; ?>

Though a param with the name show_search_form does not exist in com_finder.
If you are familiar with grep search, you can search the entire Joomla installation, to confirm that.

Expected result

To exist a param with that name in the component's config xml or in the menu item xml

Actual result

Not found

System information (as much as possible)

Joomla 4.0.3

Additional comments