Native XFCE not rendering my monitor properly to 1920 x 1080

My installation went fine and it auto detected both of my 1920 x 1080 monitors, even my 144 Hz one. But when I login now, it is stuck in 1024 x 768 and it is stuck on only my 75 Hz monitor. I have my NVIDIA drivers installed, but it won’t let me change my Display Manager. This is the default XFCE theme, not the Endeavour flavor that is available on the Welcome window.

Do you mean LightDM or the display settings from XFCE4?
If running Nvidia Driver (proprietary) you can install nvidia-settings and set displays with it:

sudo pacman -S nvidia-settings
But only apply them after setting them as you like, do not use “save to X Configuration file”
You can also set display configuration for Login Manager (Lightdm):

But before that check if Nvidia Drivers are working properly:
inxi -G

It should show driver loaded: nvidia and OpenGL: renderer: NVIDIA >>your graphiccard<<

Changing my Display Manager to SDDM seemed to do the trick, at least for now. If anything else happens, I’ll probably come back begging for suggestions later.