Hey there,
It seems like they temporarily removed it (the search bar) because there is a bug but they will put it back asap.
However, for your schema problem, I can show you how I added mine using microdata (I’m more familiar with this one)
<li itemprop="itemListElement" itemscope
itemtype="https://schema.org/ListItem" style="list-style: none;" class="tt-breadcrumb-item text-xs">
<span itemscope itemtype="https://schema.org/WebPage"
itemprop="item" itemid="{Taxonomy=category}">
<span itemprop="name"><Loop field=archive_term><Field title /></Loop></span></span>
<meta itemprop="position" content="2" />
</li>
And you can simply add this in any template and put it wherever you want it to be displayed. The schema will be grabbed by SEO.