I have not seen anyone doing this, but as I work with news daily, I think scrolling text is one that would benefit my app a lot.
I figured out I could do this through a HTML code, using an element called “marquee”.
Here’s a link to a sample marquee generator.
After generating the HTML code, you can put it in a Rich Text element for your app. In my case, as I want to display the latest headline from the news, I use it in a dynamic cell in my sheets.
And here’s a video of how it looks like on my app screen.
Hope it helps for your apps, like an announcement or something. Also the speed of scrolling should be a bit faster for my liking.