Hi Gaspar,
We are cross checked your requirement. Currently, we don’t have a built-in and custom document properties(docProps) in Word document created by Document editor.
We have considered and logged this as feature request. We will include this feature in any of our upcoming release.
We usually have an interval of at least three months between the releases. At the planning stage for every release cycle, we review all open features once again and finalize features for implementation based on specific parameters including product vision, technological feasibility, and customer interest. We will let you know when this feature is implemented.
You can track the status of feature through below feedback link:
Please up-vote this feature request to make this feature request as our priority.
Regards,
Kurthis Banu A.