Kofax or Adobe Pro Plug-Ins

Not sure what you mean with "supports Kofax or Adobe Pro Plug-Ins" ?!?

You can create Java plugins as well as HTML/JS plugins to add additional functionalities. And whether this can be done, depends on these plugins.

Appian does not directly support Kofax or Adobe Pro plug-ins. To integrate functionality from these services into Appian, you should use API integration or Appian's Robotic Process Automation (RPA) for tasks that APIs cannot handle. This approach allows you to leverage the capabilities of Kofax or Adobe Pro within your Appian applications by making API calls or automating interactions with these external services.