Enabling the Search improvements feature toggle replaces the legacy search bar with a new search bar.
v3.11
<section class="home-search-wrapper">
<div class="searchbar">...</div>
<div class="searchbar-multilang-warning">...</div>
...
</section>
v4
<section class="home-search-wrapper">
<ft-search-bar >...</ft-search-bar>
</section>