HDR controls. Nothing in the display settings so I’m lost
HDR is still WIP.
Alternative Software I haven’t spent a lot of time looking but things like wallpaper engine, rainmeter, powertoys.
Wallpaper Engine: Not a perfect replacement, but you can set a gif as a Wallpaper in Plasma. If that isn’t enough, there are alternatives (I don’t know what they can do).
Rainmeter: Also not a perfect replacement, but Plasma Widgets should at least provide the functionality.
PowerToys: Always on Top, Awake, Color Picker, & Run already have equivalent features in Plasma. File Explorer add-ons, File Locksmith, Hosts file editor, & Registry Preview aren’t needed because Linux. The others have replacements on a case-by-case basis, check the “Get More (whatever)” in the settings of relevant KDE apps.