Hi, I believe this has been (mostly) resolved at some point.
Go to:
- Add a new section
- Headlines
- One of the last options shows a banner with text and arrows indicating slideshow functionality (see attached pic)
While admittedly being a bit hard to find it and it doesn't loop automatically by itself, seems like a pretty useful block with a couple of different design options to choose from (see second pic), though I have just used the default option myself so far.