Hi @SaraMiller,
Try using the pulldata("@property", 'mode') function. Example image below - where Question 2 is readonly when the record is opened via the Inbox, and editable in a new survey.
The pulldata("@property", 'mode') function. From the Survey123 documentation (Formulas), "This has three possible values, returning new if the user is producing a new survey response (including one copied from an existing survey), returning edit if the user is editing an existing response, and returning view if the user is viewing an existing response in read-only mode."
This can be used for readonly and relevant. I have used this in forms with a required image questions (for a new survey) that is also edited via the Inbox - Survey123 Image Question: Disable 'Required' in In... - Esri Community
Hope this helps!
Jamie.