KDE plasma 6 Keyboard shortcut scripts to rotate whole screen to left or right. It works by reading current rotation state in the file $HOME/.config/krotate.rc and doing appropriate rotation for a given keystroke. This script is based on kscreen-doctor.

1. Clone repo:

git clone --depth 1 https://github.com/roopeshor/krotate ~/.local/bin/krotate

2. Give execution permissions:

chmod +x ~/.local/bin/krotate/krotate-*

3. Goto System settings -> Keyboard -> Shortcuts.
4. To create rotate left shortcut, Add New -> Command or script. In the command field, provide full path for the above scripts (~/.local/bin/krotate/krkrotate-left.sh), and some name
5. Add your required shortcut like Meta+]
6. Repeat same to add rotate right shortcut (command file: ~/.local/bin/krotate/krotate-right.sh)