Hi Renco! Hopefully I’ve understood. The only way I can replicate a similar format in the page list is to create sections inside an existing section. Doing this automatically creates sub-sections and sub sub-sections if this is what you are looking for. See attached.
It’s not in the layers panel, it’s in the pages panel!
So no this is not the same. 😉
I did find this page: Add a name for each divider topic Where there are rumours of some people being able to do similar things.