An important setting was skipped during the installation steps. As a result, even though RTX VSR was active, the RTX HDR icon was not visible, and I discovered the solution. Here's how: In MPC-HC, go to View > Options > Playback > Output, select MPC Video Renderer from the dropdown list, and then enter the settings right next to it. Here, check the box next to “RTX Video HDR” in the middle left section and select “Allow turn on” for the option in the “Windows HDR” section on the right. RTX HDR should now be active.
An important setting was skipped during the installation steps. As a result, even though RTX VSR was active, the RTX HDR icon was not visible, and I discovered the solution. Here's how: In MPC-HC, go to View > Options > Playback > Output, select MPC Video Renderer from the dropdown list, and then enter the settings right next to it. Here, check the box next to “RTX Video HDR” in the middle left section and select “Allow turn on” for the option in the “Windows HDR” section on the right. RTX HDR should now be active.