I don’t quite agree. In Section “Device” if you use that entry ForceCompositionPipeline=On is ok when you use a dynamic layout. See here Desktop Lag/Stuttering while gaming - #2 by bogdancovaciu
Also note my opinion about using both Force and FullForce FPS went to drain after ugrading from 20 to 20.1 - #16 by bogdancovaciu
Also since you are on KDE Plasma, see what i mention about the kwin.sh and the additions to the nvidia.conf.
Remove it, you don’t need it and reinstall the proprietary driver. make sure you backup your config before that, then check to not have the wrong modules blacklisted I have to reinstall my GPU drivers after every reboot - #22 by bogdancovaciu