You have to convert that project into .sas program. Then you can schedule with Platform Process Manager through SAS Management Console by deploying that SAS program and adding to a flow.
In Enterprise Guide you'll want to "Export code" from the project or process flow:
https://documentation.sas.com/?docsetId=egug&docsetTarget=n1y1rs1hlrz3w2n1h71niihwzjjh.htm&docsetVer...SAS Help Center: Export All Code<>
To export all code in a project or process flow: To export all of the code in the project, click in the Project pane. Select Share Export all code in project.. To export all of the code in a process flow, select Share Export all code in process flow on the Process Flow tab.. Specify the location where the code file will be saved.
documentation.sas.com