Wow wayland and Plasma has come a long way. 
No more screen flicker and frequent crashed anymore.
Seems my last showstopper keeps lurking though.
I use inverse screen colors  all the time when wathing,
  videos with slideshow having white background, since my
  eyes hate the white light making screen wathing impossible for me,
  if I cant reverse screen colors. Keeping fingers crossed for this last,
  showstopper to be fixed.

Operating System: Arch Linux
KDE Plasma Version: 5.25.4
KDE Frameworks Version: 5.96.0
Qt Version: 5.15.5
Kernel Version: 5.18.15-arch1-2 (64-bit)
Graphics Platform: Wayland
Processors: 12 × Intel® Core™ i7-10750H CPU @ 2.60GHz
Memory: 15,5 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 2060/PCIe/SSE2
Manufacturer: LENOVO
Product Name: 81Y8
System Version: Lenovo Legion 5 17IMH05H



STEPS TO REPRODUCE
1. Systemsetting - Shorcuts - Kwind
2. Add shortcut key combi for Invert Screen Colors


OBSERVED RESULT
No inverse of screen colors

EXPECTED RESULT
On X11 screen colors are inverted. Wish it was so on wayland to with nvidia drivers.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION