hi BillPe, please refer to the API explorer whenever you're looking for any additional fields. You'll find more info on this here:
https://experienceleague.adobe.com/en/docs/workfront/using/adobe-workfront-api/api-general-informati...
If you think the status Update contains additional information (e.g. date or time), this information would be stored in the References tab of the Project object. If it isn't there, it means it probably doesn't exist (you can sometimes toggle to the Unsupported API version in order to see additional fields).
(Spoiler alert: it probably doesn't exist.)