The nestable slider element sets each slide to be an li. However it does not set the div containing the list items to be a ul, it leaves it as a div which is semantically incorrect.
You cannot set the nestable slider element to be a ul so you have to set its parent container/block/div to a ul. However this is also semantically incorrect as the ul then contains other divs before you get to the list items. You can see this in the screenshot below. The line is blue is the container holding the nestable slider. There are then 3 divs before you get to the list of slider items. The div with the class splide__list should automatically be a ul rather than a div.
Yes sorry, I’m using a frames card which is set to li.
Surely though as we can set the items in the slider to be list items we need the ability to set the slider to be a ul so for screen readers the html is semantically correct.
I’ll move the thread accordingly.