It appears the information you are after is displayed in the Planned Appointments Tab in the Chart Module (https://opendental.com/manual/apptplanned.html. We can create an API method (ChartModules GET PlannedAppts) to return the information in this grid, as well as the AptNum and ProcNums for the procedures.
Please see my reply on your other post for how we will implement an API method to schedule Planned appointments.
A new method ChartModules GET PlannedAppts has been completed and will facilitate scheduling appointments with Appointments POST SchedulePlanned. It will display the complete list of Planned appointments as seen in the Chart Module in Open Dental. See https://www.opendental.com/site/apichartmodules.html for more information.
This method will be available in our next beta version, 22.2.16, which is estimated to be released within the next week.