The question is a little unclear, perhaps this is the reason for no responses.
Typically, properties of this nature are added to schematic border sheets, and use Settings / Border Properties and Tools -> Update Other Objects, Properties.
You can add property definitions in the Central Library using Library Manager Tools -> Property Definition Editor.
Since the borders are annotation symbols, they do not synchronize with any layout data. You can use the Document.PutProperty method to set and Document.FindProperty to get board-level property values.
Hope this helps.