I sometimes encounter a Windows 10 system on which many of the Advanced Settings in Power Management Options are missing.

These settings include things like minimum and maximum Processor state, etc.

I found the following procedure to fix the problem in most cases:

1. Open Regedit as Administrator
2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power
3. Change the value of CsEnabled from 0 to 1
4. Reboot

In some cases, this does not solve the issue. In that case, you might try this:

1. Open Regedit as Administrator
2. Navigate to \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings
3. Here you will find a lot of subfolders that are seemingly named with a GUID.
4. Expoand the sub-folders and inspect the content. Locate Description and Friendly Name which describe what setting they control.
5. For each setting you want visible, change the REG_DWORD value of Attributes to 2. Create Attributes if it does not exist.
6. Reboot

Now the selected power options should be visible under Advanced Settings.