Hi, since I saw this post. I’m curious. Is there a software shiny future?
Because I can’t use the xrandr package in Wayland and KDE doesn’t use wlr. So I had to stop using KDE 
Hi. I am not sure if I understand your question correctly. KWin in KDE Plasma 6.2 supports software brightness. But it can also ask the PowerDevil service to set hardware brightness. Many of the complaints are because KWin sets hardware or software brightness to an unexpected value.
What did you want to do with KDE that doesn’t work right now?
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Hello, I apologize if I have written something misunderstood or meaningless. English is not my language so I might have written wrong.
I am an External Monitor user and my Monitor does not have any hardware brightness settings like DDC/CI. But this is not a problem for me because in X11 KDE Plasma I could adjust the software brightness with xrandr. But when I switched to KDE Plasma Wayland I found out that I cannot use wlr-randr because KDE does not support wlr-gamma-control-unstable-v1 and there is no feature or tool for it in KDE