Hi,
I'm searching for a window decoration theme that only has a frame, no buttons or anything more. Something like what Bismuth had. The one I pulled from AUR works on my Arch system (even though it's not supported for Plasma 6) but I want to install this on my Thinkpad that has Aurora Linux. But since I only want the window decoration part, any theme like this would work for me.
Edit: Thanks to Remus86, I was able to install Bismuth.
Though, because of the nature of immutable, it was tough. I had to use rpm-ostree a lot, which Aurora devs don't recommend to use. I had to install
sudo rpm-ostree install cmake gcc-c++ extra-cmake-modules qt6-qtbase-devel qt6-qtquickcontrols2-devel qt6-qtdeclarative-devel qt6-qtsvg-devel qt6-qtwayland-devel kf6-kconfig-devel kf6-kcoreaddons-devel kf6-ki18n-devel kf6-kxmlgui-devel kf6-kdeclarative-devel kf6-kcmutils-devel kf6-kglobalaccel-devel kdecoration-devel
just to be able to compile Bismuth.
Later, since cmake couldn't write on a read-only system, I had to modify the location to my home directory.
cmake .. -DCMAKE_INSTALL_PREFIX=$HOME/.local
I added this installed location as QT_PLUGIN_PATH, just for KDE settings to see it as a theme.
export QT_PLUGIN_PATH=$HOME/.local/lib64/plugins:$QT_PLUGIN_PATH
But it was not persistant between logins so I also wrote it to bashrc:
echo 'export QT_PLUGIN_PATH=$HOME/.local/lib64/plugins:$QT_PLUGIN_PATH' >> ~/.bashrc
Also created a bismuth_kdecoration.desktop file for it, under ~/.local/lib64/plugins/org.kde.kdecoration3:
[Desktop Entry]
Type=Service
X-KDE-ServiceTypes=KDecoration
X-KDE-Library=bismuth_kdecoration
Name=Bismuth
Comment=Bismuth
Then I set the permissions: chmod -R 755 ~/.local/lib64/plugins/org.kdecoration3/
When I restart, I was able to use Bismuth.

For me the best ones were Final Fantasy Brave Exvius and Love Live School Idol Festival. Currently playing Umamusume Pretty Derby and it's fine but it's kinda brutal if you're trying to catch the meta as F2P.
Also gacha games are fine at launch (and maybe just before they close the doors forever). Other than that they're just whalefest, especially if they're popular.
No idea how long I'm gonna stick to Umamusume but I feel it won't be years.