We use iO Dark, which shows these in the demo and takes me to UI.X.2 documentation when I tried to figure it out myself, so I assumed this would be the best place to ask! Sorry if that's not the case, but thanks for your help regardless. This is how it currently displays. I've tried editing the settings under node/forum list but have had no luck so far.
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Editing to add that I'd been looking at the wrong demo! So sorry for the misunderstanding there, iO Dark does hide them by default so I'm likely in the wrong place. Sorry about that!