Some TreeItems are meant to be informational, not interactive. An information TreeItem that can be clicked on or has a highlight on hover is confusing to users that might expect something to happen.

Maybe there is a non-tree DataProvider I am not aware of 🤷.
For example I have data I would like to display in the sidebar of my custom extension. I use a custom TreeView with informational TreeItems like this:

Users get confused when they hover over a TreeItem an it is highlighted

Or when they click on a spacing TreeItem

It could be helpful to add a property to TreeItem that disables the hover and clicking.