Ok - I moved this thread to ‘applications’ and left a redirect (in the previous forum area) in for 1-week.
As to your support request …
This is an unusual approach, using the latest KDE Plasma 5.23.1 with openSUSE-15.3, instead of going to Tumbleweed. Most, who want more functionality with a more cutting edge KDE would go to Tumbleweed.
As for ability introduced in powerdevil to select power profiles - I assume you might be referring to posts such as this ( https://pointieststick.com/2021/07/23/this-week-in-kde-power-profiles-and-a-more-polished-kickoff/ ) which refers to this ( https://invent.kde.org/plasma/powerdevil/-/merge_requests/49 ) in powerdevil.
A caution about this. My understanding/experience is that openSUSE-15.3 uses TLP for battery life management. Nominally its default settings are optimized for battery life (and it will have no presetup configuration file upon openSUSE-15.3 installation) although purportedly TLP is highly configurable.
Note that according to the TLP faq ( https://linrunner.de/tlp/faq/installation.html ) that power-profiles-daemon.service prevents TLP from making power saving settings at system startup and hence if using TLP it is recommended to disable power-profiles-daemon. Hence even if you were able to build/install power-profiles-daemon, it may cause issues with your laptop’s battery power saving - making matters worse in an effort to obtain some desired feature.
I don’t know the SuSE-GmbH/openSUSE packagers plans for the future, if they will stick with TLP (and not install power-profiles-daemon), or if they will come up with some TLP configuration file to work with power-profiles-daemon, or if they will abandon TLP and use an app such as thermald instead of TLP with power-profiles-daemon (which may not be a viable approach ?? ).
If you wish to persist in spite of these potential problems, I suppose you could try to build power-profiles-daemon yourself with an app such as ‘rpm-build’. I do so on occasion myself (for example I built a custom ‘FreeFileSync’ for my laptop running openSUSE-15.3 when the normal packagers of that app did not provide such for openSUSE-15.3 when they had build issues).
But ‘rpm-build’ is a hit-and-miss way to build, and most packagers likely shake their head at it and I think most would recommend against using ‘rpm-build’. It requires the .src file (for a previously build version (such as that of Tumbleweed) for ‘power-profiles’daemon’, and then in my experience many iterative efforts to build the desired rpm, as one has to gradually solve all the various failed dependencies, installing various .devel rpms for different applications during the iterative build attempts. You also note a glibc potential issue, and I do not know if the newer glibc is a power-profiles-daemon build requirement (ie will it build against an older glibc)?
… And as noted, in this case, even if you succeed to build, it may not work with TLP.
Apologies that I can not offer more help, but this is pretty much the extent of my knowledge on this specific topic.