JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<td class="aluno" style="text-transform:uppercase">
  Fulano
  <a class="obs-aluno" href="#modal-obs">
   Link
  </a>
</td>
</table>

CSS

.obs-aluno{
  display:none
}
.aluno:hover > a{
  display:block
}