Is the new 'tooltip with HTML' feature SEO-friendly? Wouldn't the HTML markup obscure the text?

  <button type="button" class="btn btn-secondary" data-toggle="tooltip" data-html="true" title="<em>Tooltip</em> <u>with</u> <b>HTML</b>">Tooltip with HTML</button>

https://getbootstrap.com/docs/4.0/components/tooltips/