Tried the example and added the property `data-background-interactive=false` and still can interact with the embedded website:

[Alking100]

Tried the example and added the property data-background-interactive=false and still can interact with the embedded website:

<section data-background-iframe="https://slides.com/news/make-better-presentations/embed?style=hidden&autoSlide=4000" data-background-interactive=false>
    <h2>Iframe background</h2>
</section>

Originally posted by @Franky1 in https://github.com/hakimel/reveal.js/issues/3246

Originally posted by @Alking100 in https://github.com/NahuelBaridon/NahuelBaridon.com/issues/3