Hello @newwollyka,
When a survey is published from Survey123 Connect (or website) and a feature service is created with the survey publish editor tracking fields are automatically enabled on the service. This means by default your feature service will have CreationDate field that will capture when the feature was created in your ArcGIS organization. If you created the survey based on an existing feature service you will need to check that the feature service has editor tracking enabled.
To capture the date and time the survey was opened you can use the `start` question type in your XLSForm which will capture the start date and time of the survey. Please see this link for reference. You can also use the `end` question type in your XLSForm to capture the time the survey was submitted, but the CreationDate field in the feature service will tell you what time the feature was created.
Thank you,
Zach