The general autoplay speed can be changed within the > Lay Options > Carousel Addon >
However for each to have a different speed this link may help:
http://laythemeforum.com:4567/topic/6220/carousel-add-on-speed-and-caption/4
You would need to add a custom Class or ID to each Carousel so you can target them individually:
Have a wonderful day 🌻 Richardhttps://laytheme.com/documentation/custom-css-styling.html