There is the Wacom Tablet And Pen - Manjaro wiki. If that is not helpful, just open up terminal and run this command:
sudo pacman-mirrors -f5 && sudo pacman -Syyu kcm-wacomtablet
You have to reboot the system after that to be available, and some tablets need to be turn off and on again at first boot to work.
Only the models that got added … so no, not all of them.