@Shane Main, you can try using my utility to have it proper 16:9 (works for most games which supports "windowed mode")
https://github.com/BigGreenDelta/Borderless-Window-Utility/releases/latest
Don't forget to make UI scale a bit lower (10-13 will do the trick)
Download the Borderless-Window-Utility.exe
Optional:
Create profiles.ini file in the same folder as Borderless-Window-Utility.exe
Add this into it (it's what I am using)
[Vintage Story]
x = 1323
y = 0
width = 2474
height = 1392
From now on you can just double-click on Borderless-Window-Utility.exe any time you want your game's screen to be automagically set to borderless in the dead centre of your monitor (for windows 11 it will also be above the taskbar)
Feel free to play with this tool and share your feedback!