https://sengroup.vn/
Hi. On this site it is configured as well as I told you above - 1 active item. The carousel cannot be configured differently. Just additional CSS code is used to create such an appearance.
I show you in SPPB 3 (in SPBP 4 the same).
Step 1

Step 2 - Set up it to your taste

Step 3 - Add your own class to addon

Step 4 - Use css
.YOUR_CLASS .sppb-carousel-extended-list {
overflow: visible;
}
.YOUR_CLASS .sppb-carousel-extended-item {
padding-inline: 20px;
transition: opacity .3s;
}
.YOUR_CLASS .sppb-carousel-extended-item:not(.active) {
opacity: .3;
}
Result
