Lost the HDR option

Optiplex 3060 MFF i5 8500

The HDR option will not switch on. 

Has Dell or Microsoft gone and meddled and broken it?

Tried both 31.0.101.2134 and 2135, but neither enable the HDR option.

Report:

Report Date: Monday, 18 August 2025
Report Time [hh:mm:ss]: 08:43:13 PM
Operating System: Microsoft Windows 11 Pro 10.0.26100
IGCC Version: 1.100.5688.0
Language: en-GB
Physical Memory: 15.83 GB 
Current Resolution: 3840x2160

Processor: Intel(R) Core(TM) i5-8500T CPU @ 2.10GHz
Processor Speed: 2112 MHz
GFX Driver Name: Intel® UHD Graphics 630
Shader Version: 6.5
OpenCL* Version: 3.0
* Microsoft DirectX* *
Runtime Version: 12
Hardware-Supported Version: 12
Vendor ID: 8086
Device ID: 3E92
Device Revision: 00
GFX Driver Version: 31.0.101.2134
Dedicated RAM: 128 MB
Shared RAM: 8 GB
Max Supported Displays: 3
GFX Vulcan: 1.3.215
GFX GOP: 9.0.1079

* Devices connected to the Graphics Accelerator *

Active Displays: 1

* Digital Display 1 *

Display Name: Panasonic-TV
Display Type: Digital
Serial Number: -
DDC2 Protocol: Supported
Gamma: 2.2
Connector Type: DisplayPort

Maximum Image Size
Horizontal - 47.64 inches
Vertical - 27.17 inches

Supported Modes
640 x 480 (60p Hz)
640 x 480 (72p Hz)
640 x 480 (75p Hz)
720 x 400 (70p Hz)
720 x 480 (60p Hz)
720 x 576 (50p Hz)
800 x 600 (56p Hz)
800 x 600 (60p Hz)
800 x 600 (72p Hz)
800 x 600 (75p Hz)
832 x 624 (75p Hz)
1024 x 768 (60p Hz)
1024 x 768 (70p Hz)
1024 x 768 (75p Hz)
1152 x 870 (75p Hz)
1280 x 720 (50p Hz)
1280 x 720 (60p Hz)
1280 x 800 (60p Hz)
1280 x 960 (60p Hz)
1280 x 1024 (60p Hz)
1280 x 1024 (75p Hz)
1400 x 1050 (60p Hz)
1440 x 900 (60p Hz)
1600 x 1200 (60p Hz)
1680 x 1050 (60p Hz)
1920 x 1080 (24p Hz)
1920 x 1080 (25p Hz)
1920 x 1080 (30p Hz)
1920 x 1080 (50p Hz)
1920 x 1080 (50i Hz)
1920 x 1080 (60p Hz)
1920 x 1080 (60i Hz)
3840 x 2160 (24p Hz, 4K)
3840 x 2160 (25p Hz, 4K)
3840 x 2160 (30p Hz, 4K)
3840 x 2160 (50p Hz, 4K)
3840 x 2160 (60p Hz, 4K)
4096 x 2160 (24p Hz, 4K)
4096 x 2160 (50p Hz, 4K)
4096 x 2160 (60p Hz, 4K)