In my experience no there is not ADA/ADM (avg daily attendance or membership) for a student who is pre-registered. Unless I am misunderstanding, a student who has not yet started attending has no attendance and therefore no ADA/ADM. PS has ADA/ADM reports on the admins side (you posted this in the mobile forum) under Start Page > System Reports > System tab. There are also data access tags that allow you to pull this information and those are in the data access tags supplement.
If you are not a PS admin user you may need to reach out to the school district for assistance.