From what I've learned about <amp-carousel> it has only 2 types of carousel interface: carousel and slides, which you can see on the AMP example website. I need to create something like this, multiple columned carousel. Is AMP carousel able to achieve this?
You can't customize amp-carousel the way you want, you need to check out amp-base-carousel which allows you to set visible-count, advance-count and other useful properties.
Example :
<amp-base-carousel
loop="true"
height="450"
layout="fixed-height"
visible-count="(min-width: 1150px) 3, (min-width: 700px) 2, 1"
advance-count="(min-width: 1150px) 3, (min-width: 700px) 2, 1"
>
<div>slide1</div>
<div>slide2</div>
<div>slide3</div>
<div>slide4</div>
<button slot="next-arrow" class="carousel-next" aria-label="Next">
<i class="fas fa-chevron-circle-right"></i>
</button>
<button slot="prev-arrow" class="carousel-prev" aria-label="Previous">
<i class="fas fa-chevron-circle-left"></i>
</button>
</amp-base-carousel>
With some style for the buttons :
.carousel-prev, .carousel-next {
filter: drop-shadow(0px 1px 2px #4a4a4a);
width: 40px;
height: 40px;
padding: 20px;
background-color: transparent;
border: none;
outline: none;
font-size: 24px;
opacity:0.7;
}