Content structure
The carousel's code includes a global description to introduce it to blind users (e.g., 'Top news', Highlights', 'Coming events'). This should be properly filled in.
Each carousel slide will also be automatically numbered for screen reader users (e.g., 'slide 1 of 3'), complementing the slide's content description.
Accessible names
Carousel background images are usually decorative and don't require description. If they are not purely decorative, you need to describe them.