I picked up the game yesterday - really enjoying it apart from the fan noise from my GTX1060 that is!
This might be of some use? I had the same issue with Rust since they moved over to Unity 5? a couple of years ago. Now instead of selecting vsync in the graphics menu, the only way to do it is to press F1 for the in-game console, and type in: fps.limit (60)
Hope this is of some help to the devs?