Are there reports to see payroll transactions that are happening for a single employee? For instance, if I have an employee who has two jobs, but I only have security access for one of the jobs, can I see payments that are happening for the other depts.??

If you have access to the Review Paycheck page for an employee, you can see all of the details that they were paid, including details from other jobs that are not part of your regular visibility. However, beyond usage of the PREPSHUP tables, you will only be able to view recurring additional pay and one-time payments for the departments that you have visibility into.