Slides Extended can automatically animate elements across slides. All you need to do is add data-auto-animate to two adjacent slide annotations and Auto-Animate will animate all matching elements between the two.

Here's a simple example to give you a better idea of how it can be used:

<!-- .slide: data-auto-animate -->
# Title

---
<!-- .slide: data-auto-animate -->

# Title
##### **Subtitle**
###### *Author - 2022* 
Tip

To learn more about Auto-Animation visit reveal.js Documentation