https://pro.arcgis.com/en/pro-app/latest/arcpy/geoprocessing_and_python/parameter-controls.htm
It would be helpful if something like arcpy.parameters.appearance.multiline_text_clsid (or similar) existed. This would make it easier to programmatically access control CLSIDs. Such an approach would improve usability and maintainability, as developers wouldn't need to search for or manually input CLSIDs.
Having a structured API like this would make programming more efficient and less error-prone.