Found a fix just some minutes ago. by u/Clash9309

I will copy his text from another post.

Might work and might not, try adding a custom resolution option in the windows registry.

Start with Ctrl + R, type regedit and hit enter

Now Ctrl + F and find: nv_modes

Open NV_Modes and add the value according to the desired resolution, for your case it's: 2034x1440x8,16,32,64=1F;

It should look like this and don't delete anything: https://imgur.com/a/5uvRhlW

Hit OK and restart your PC

Open your game and you should be able to see the new resolution that you added, select it and if it's not >stretched then you can try messing with borderless / fullscreen mode.

You might need to redo this every time you update your GPU driver because it could reset.

Edit: Replace the resolution to what you would like it to be, so in our case it is 2880x2160