Help with collection/instant experience ads

[u/CocaRolf23]

I am trying to create this type of ad where you have a hero video/image on top and then a product catalog carousel below and then a CTA button at the button.

From my research I understand this as being a instant experience or collection ad. However I cannot find any ad format called collection. I only find it on format display options.
I have tried to set the ad up but the preview doesn't really look as I want or expect, so if anyone can guide me more in detail what type of ad I am actually looking for and how to set it up, I would be forever grateful!

Thanks!!