Can't get proprietary NVIDIA 470 driver to output 4:4:4 to 4k TV monitor

Hi all,

I was hoping for some help on how to force 4:4:4 output to my 4k UHD TV that I’m using as a monitor.

I’m using Fedora 38 KDE with version 470.182.03 NVIDIA drivers and xorg, not wayland. I can’t get full 4:4:4 RGB output, only YCbCr 4:2:0, which makes reading text give me a headache.
I know my TV and miniDP to HDMI adapter support full 4:4:4 output, as when I first start my computer from full power-off, the KDE login screen outputs it. Then, when I login, I get a few black screen flashes, and output switches to 4:2:0 and cannot be changed back to 4:4:4.

Screenshot of my NVIDIA X Server Settings for this display:

My .nvidia-settings-rc file:

#
# /home/aisha/.nvidia-settings-rc
#
# Configuration file for nvidia-settings - the NVIDIA X Server Settings utility
# Generated on Fri May 19 01:39:39 2023
#

# ConfigProperties:

RcFileLocale = C
DisplayStatusBar = Yes
SliderTextEntries = Yes
IncludeDisplayNameInConfigFile = No
ShowQuitDialog = Yes
UpdateRulesOnProfileNameChange = Yes
Timer = Memory_Used_(GPU_0),Yes,3000
Timer = Thermal_Monitor_(GPU_0),Yes,1000
Timer = PowerMizer_Monitor_(GPU_0),Yes,1000

# Attributes:

0/SyncToVBlank=1
0/LogAniso=0
0/FSAA=0
0/GammaCorrectedAALines=0
0/TextureClamping=1
0/FXAA=0
0/AllowFlipping=1
0/FSAAAppControlled=1
0/LogAnisoAppControlled=1
0/OpenGLImageSettings=2
0/FSAAAppEnhanced=0
0/GammaCorrectedAALinesValue=16
0/ShowGraphicsVisualIndicator=0
[DPY:VGA-0]/Dithering=0
[DPY:VGA-0]/DitheringMode=0
[DPY:VGA-0]/DitheringDepth=0
[DPY:VGA-0]/SynchronousPaletteUpdates=0
[DPY:LVDS-0]/RedBrightness=0.000000
[DPY:LVDS-0]/GreenBrightness=0.000000
[DPY:LVDS-0]/BlueBrightness=0.000000
[DPY:LVDS-0]/RedContrast=0.000000
[DPY:LVDS-0]/GreenContrast=0.000000
[DPY:LVDS-0]/BlueContrast=0.000000
[DPY:LVDS-0]/RedGamma=1.000000
[DPY:LVDS-0]/GreenGamma=1.000000
[DPY:LVDS-0]/BlueGamma=1.000000
[DPY:LVDS-0]/Dithering=0
[DPY:LVDS-0]/DitheringMode=0
[DPY:LVDS-0]/DitheringDepth=0
[DPY:LVDS-0]/DigitalVibrance=0
[DPY:LVDS-0]/ColorSpace=0
[DPY:LVDS-0]/ColorRange=0
[DPY:LVDS-0]/SynchronousPaletteUpdates=0
[DPY:DP-0]/RedBrightness=0.000000
[DPY:DP-0]/GreenBrightness=0.000000
[DPY:DP-0]/BlueBrightness=0.000000
[DPY:DP-0]/RedContrast=0.000000
[DPY:DP-0]/GreenContrast=0.000000
[DPY:DP-0]/BlueContrast=0.000000
[DPY:DP-0]/RedGamma=1.000000
[DPY:DP-0]/GreenGamma=1.000000
[DPY:DP-0]/BlueGamma=1.000000
[DPY:DP-0]/Dithering=0
[DPY:DP-0]/DitheringMode=0
[DPY:DP-0]/DitheringDepth=0
[DPY:DP-0]/DigitalVibrance=0
[DPY:DP-0]/ColorSpace=2
[DPY:DP-0]/ColorRange=0
[DPY:DP-0]/SynchronousPaletteUpdates=0
[DPY:DP-1]/Dithering=0
[DPY:DP-1]/DitheringMode=0
[DPY:DP-1]/DitheringDepth=0
[DPY:DP-1]/ColorSpace=0
[DPY:DP-1]/ColorRange=0
[DPY:DP-1]/SynchronousPaletteUpdates=0
[DPY:DP-2]/Dithering=0
[DPY:DP-2]/DitheringMode=0
[DPY:DP-2]/DitheringDepth=0
[DPY:DP-2]/ColorSpace=0
[DPY:DP-2]/ColorRange=0
[DPY:DP-2]/SynchronousPaletteUpdates=0
[DPY:DP-3]/Dithering=0
[DPY:DP-3]/DitheringMode=0
[DPY:DP-3]/DitheringDepth=0
[DPY:DP-3]/ColorSpace=0
[DPY:DP-3]/ColorRange=0
[DPY:DP-3]/SynchronousPaletteUpdates=0
[DPY:DP-4]/Dithering=0
[DPY:DP-4]/DitheringMode=0
[DPY:DP-4]/DitheringDepth=0
[DPY:DP-4]/ColorSpace=0
[DPY:DP-4]/ColorRange=0
[DPY:DP-4]/SynchronousPaletteUpdates=0
[DPY:DP-5]/Dithering=0
[DPY:DP-5]/DitheringMode=0
[DPY:DP-5]/DitheringDepth=0
[DPY:DP-5]/ColorSpace=0
[DPY:DP-5]/ColorRange=0
[DPY:DP-5]/SynchronousPaletteUpdates=0

My xorg.conf file:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 470.182.03

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/input/mice"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Lenovo Group Limited"
    HorizSync       56.5 - 67.8
    VertRefresh     50.0 - 60.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "Quadro K2000M"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-1"
    Option         "metamodes" "LVDS-0: nvidia-auto-select +0+1080, DP-0: 3840x2160_60 +1920+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

My xorg log file (in pastebin because too long for here):
https://pastebin.com/6qhTdNsL

Any input on how I can fix this would be greatly appreciated.
Thanks.