This is in the live version but I will post it here in the hope that it gets fixed
0_1558509298919_Screenshot (4).png As you can see in this photo I have options up to 2160p, however I only have a 1080p monitor, and do not have DSR activated

0_1558509320018_Screenshot (9).png

As you can see in this photo the game states it is running in fullscreen mode however this is obviously not the case

PS. can you please increase the fps cap in the menus from 60 to 144 for high refresh rate monitors?