It isn't clear why it isn't working for you. Quick tests appear to show the feature fully functional. What does the log say?
It should say something like:
Time,Computer name,User name,PID,Process name,Action,More info,Path,Command line
06-21-2020 09:51:15,BITSUM-PRIMARY,jerem,5876,notepad.exe,Active power plan changed,Per request of process default the power plan is now Ultimate Performance,,
06-21-2020 09:51:15,BITSUM-PRIMARY,jerem,5876,notepad.exe,Automatic Performance Mode ON,Automatic Performance Mode was turned on because a specified game process was found running.,c:\windows\system32\notepad.exe,"C:\WINDOWS\system32\notepad.exe"
The log may give a clue...