JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<div class="caldera-grid">
<div></div>
<form class="caldera_forms_form">
<input type="hidden"/>
<input type="hidden"/>
<div class="ss-form-fields"></div>
<div class="ss-form-fields"></div>
</form>
</div>
<div class="caldera-grid">
<div></div>
<form class="caldera_forms_form">
<input type="hidden"/>
<input type="hidden"/>
<div class="ss-form-fields"></div>
<div class="ss-form-fields"></div>
</form>
</div>

JavaScript

$(".caldera-grid").each(function(){
let fields = $(this).find('.ss-form-fields')
$(this).find('.caldera_forms_form').prepend(fields);
});