The Carousel ad format allows you to create a visual story for business, products and services. Each card can send customers to different aspects of your website. So, that you can drive traffic to multiple areas on your website with one ad.
As a link is required for each card, you wouldn't be able to do this for a call now CTA button. However, you can try using a slideshow which is also an engaging format for viewers.
You can use a slideshow to tell a story that develops overtime with the images. It is just as creative and compelling as a Carousel format.
I will leave links with more information on both Carousel and slideshow ads:
https://www.facebook.com/business/ads/slideshow-ad-format
https://www.facebook.com/business/help/1375829326076396
I hope this helps
- Luke
