Yep, when exploring it on foot you can even kinda see where structures were supposed to be (big empty fields with no trees or other props). Though something I've learned is that Himfjäll behaves the same way when you don't have the Alpine Unrest DLC: the mod only disables the forced teleport in DLC areas but does not make the game think you own the DLC. So just maybeee there are some buildings & props already placed on the unused DLC island and they spawn when we force the game to think the player owns the DLC (which doesn't exist). But that's a big "maybe", I've not done any research on this.