JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <fieldset>
        <legend>Foobar</legend>
        <ol>
            <li>
                <label for="searchbox">Search</label>
                <input type=text name=search id=searchbox>
                    <span class="ico-search">.</span>
            </li>
        </ol>
    </fieldset>
</form

CSS

.ico-search {
    margin: -2em;
    z-index: 2;
    
    /* boiler plate stuff */
    background-color: black;
    height: 1em;
    width: 1em;
    display: inline-block;
}