I thought they could be. I know you can have a PPV in a Blueprint in the public build, but at my last job I set up a BP to find all volumes with a tag, then set new PPV settings with a trigger. Downside is that if you haven’t placed volumes in your buildings yet, you will need to and you’d have to tag them. But maybe you can procedurally place it based on size of the rooms or something and you can set the tags at once if you have multiple selected.