Ark: Survival Evolved Xbox One X Gameplay Review which showcases the 1440p at 30fps and the 1080p at 60fps mode options, note that vsync is turned off as is the default. Turning on vsync takes away from performance and was not shown for that reason.
The Ark Survival Evolved Xbox One X gameplay review goes over the two graphic options, 1440p and 1080p with HDR and the frame rates they present. This does help make the game screen tear less, but the performance is still not exactly perfect by any means. The video showcases the two options with a variety of dinosaurs and terrains. This game is a blast with friends as you survive each other, various creatures and battle massive bosses.