hearty ridge
i tried to use "immersive mode" for exploration on a dedicated server, and set the config entry "{"TagName": "WDS.Parameter.EasyExplore"}": false, which suggests "no easy exploration", hence "immersive mode" on (no question marks on unexplored terrain).
turns out it is actually the other way round, and i needed to set "{"TagName": "WDS.Parameter.EasyExplore"}": true to have the "immersive mode" on my dedicated server.
seems like an oversight and true/false should be swapped, or the config setting should be called "WDS.Parameter.ImmersiveMode" instead.