I had to edit Windows registry to get this game running in true full screen. You can find guide on reddit. This game was always running in borderless for some reason even if I had it set to Fullscreen. You can know when youre not full screen when alt+tab from game is instant (without black screen for two seconds).
Borderless is causing noticeable input lag in all games and when you switch to true fullscreen it gets really better + you also should get +/-10fps more with true Full screen.
This happens with some games while using Windows 10 (not sure how with 11), so you always wanna make sure youre in true fullscreen by alt-tabbing. I think this could be caused by some of more recent Windows update.