Can you use a value of a field in a form to create a schedule or send an automated SMS to a client registered as a client / user within the system? For example, can the system send an automated SMS to CHWs based on the appointment date that was sent in a form e.g (ANCV)?
Yes, you can. The form must be defined in app_settings.json as a registration form and then have a trigger for a particular set of scheduled messages. The start_from field in the schedule object will then be set as the form field that contains the date you want to use.
More documentation on this can be found here.