I need to add a hidden question to the start of a survey so that the start time is recorded and then at the end of the survey so the end time is recorded.
This needs to autopopulate so the surveyor cannot manually add or change the time.
There is a start and end field type that you should see in the drop down.
See the help for more info
Tracking surveys—Survey123 for ArcGIS | Documentation
This is a great tool, except for when you want to use data that exists via inbox. The Start does not override the time.