Constant CPU base clock - intel speedstep not working?

Hello,
I'm evaluating Parallels Desktop 15.1.2 with a Windows 10 pro (1909) VM on a Macbook Pro (16inch) Core i9-9880h. Everything works fine, except the processor power management.
Taskmanager:
Displays constant 2.3Ghz (the base clock) for all 8 virtual cores, independent of the current load.

I would expect that in idle the cpu clock speed would go done and save energy. Unfortunately the options under
energy options -> advanced options -> processor power management
"Minimum processor state" and "Maximum processor frequency" are missing.

Kind regards.

 

Could you provide us with the screenshot of the processor state please?

 

Hello,
Here is the taskmanger:


energy options:

 

Thanks a lot for the provided info. Could you also collect the tech report please?
Please collect the tech report right after the issue reproduced and post the repost's ID here.

 

Can you confirm that host mac is also not clocking down via Intel Power Gadget? If it isn't, your issue may be the same as https://forum.parallels.com/threads/strange-cpu-behaviour-high-clock-speed-low-utilisation.345190/