How to check your monitor whether support HDR
Starting with Windows 10 version 1809, the Settings app isn't aesthetically changing significantly, but you'll notice some improvements.
On Settings > System, the Display page now features a new Windows HD Color page with settings to control high dynamic range (HDR) and wide color gamut (WCG) settings on supported displays for content like videos, photos, and games.
If you're not sure if your display supports "Windows HD Color," the supported features will be reported under the "Display capabilities" section.
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Reference URL
https://www.windowscentral.com/whats-new-settings-app-windows-10-october-2018-update#networkinternet_new_settings_windows10_1809