Open Kodi and go to Settings - System Info
Hardware
It shows the CPU speed and free, total RAM at the bottom.
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Video
It can show the HDR capability of your tv.
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Make sure to use an HDMI 2.0 cable and not a 1.4 one.
Enable Enhanced Color Mode on your tv's Video/HDMI CEC options.
After powering on device, do a cold reboot then it will show the correct values if it shows none.

If your tv only supports HDR10 it will only show that.
If your tv also supports HDR10+(VP9 codec used for Youtube HDR mostly) it will show both HDR10, HDR10+ as supported.
Useful if you have an older tv and not sure what HDR modes it supports.