What is happening on different power-modes?

[boredsquirrel]

From F41 (I think?) on, tuneD is used

F40 Change Proposal: Tuned Replaces Power-profiles-daemon (Self-Contained)

Tuned Replaces Power-profiles-daemon Wiki Announced This is a proposed Change for Fedora Linux. This document represents a proposed Change. As part of the Changes process, proposals are publicly announced in order to receive community feedback. This proposal will only be implemented if approved by the Fedora Engineering Steering Committee. Summary Tuned and power-profiles-daemon provide a similar function to set and tune the power status of a system. However, the power-profiles-daemon…

So you should look into their documentation

https://tuned-project.org

PDF Presentation

RedHat docs