Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

HTML

<ul class="rodapeUlCat margin-top-25">
        <li><h3><a href="/paginaSYS">tituloMenuSYS</a></h3></li>
        <li><h3><a href="/paginaSYS">tituloMenuSYS</a></h3></li>
        <li><h3><a href="/paginaSYS">tituloMenuSYS</a></h3></li>
        <li><h3><a href="/paginaSYS">tituloMenuSYS</a></h3></li>
        <li><h3><a href="/paginaSYS">tituloMenuSYS</a></h3></li>
        <li><h3><a href="/paginaSYS">tituloMenuSYS</a></h3></li>
        <li><h3><a href="/paginaSYS">tituloMenuSYS</a></h3></li>
        <li><h3><a href="/paginaSYS">tituloMenuSYS</a></h3></li>
        <li><h3><a href="/paginaSYS">tituloMenuSYS</a></h3></li>
    </ul>
    <div class="rodapeCat">Outras Categorias (16)</div>

JavaScript

var total = $(".rodapeUlCat li").size();
    $(".rodapeCat").text(total);

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JSFiddle - React, Tailwind, and code Playground

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