Get a list of unreferenced process models

I do not know of a way to include process models here.

Just as some background information I think it would not make sense to include process models into this filter since it does not mean that a process model object is not being used. Think of process models being initiated by triggers or being configured as application action.

Also I do not see any practical way other than checking all process model dependents one-by-one. Keep in mind that unless you have 1000+ process models this can be done in little time still.

Also something you can do is explain your need to Appian and create a feature request for this via MyAppian.