There is a workaround to build part-time schedules. In the "new schedule" screen, you can load a native part-time schedule and modify it. You can then save it and it will be a part-time schedule that can be saved/loaded for part-time clubs.
I've built the 5 schedules from
@ZaZ as part-time schedules (obvisouly not as efficient as full-time as HarvestGreen's data was all about progress from Full-time schedules as far as I know).
They are doing pretty well in my save, but I have no data-science-level information on how well they behave. My gut feeling is that my players are doing well