Hello, 

There is a warning on the power monitoring tool which says its only available for baremetal, this message is displayed at the bottom of the page this it should be the first warning 

Warning should be in below part of the documentation https://docs.openshift.com/container-platform/4.15/power_monitoring/power-monitoring-overview.html#power-monitoring-about-power-monitoring_power-monitoring-overview

Currently the warning is in below

https://docs.openshift.com/container-platform/4.15/power_monitoring/power-monitoring-overview.html#power-monitoring-hardware-virtualization-support_power-monitoring-overview