Hi Tanessa? (is that your first name?)
Yes, this is a perfect example of some of the wonderful, not very well documented, things that CA PPM has to offer
Yes, you need of course timesheet approval permissions to launch this XOG. But if what you state here is true, then it seems you do have it. I used that XOG in a process to auto-approve submitted timesheets and it worked like a charm. But i have no access to their platform today to check the permissions.
What I would do is the following:
>> add all the timesheet rights to your user (also Navigate / Edit All)
>> test this xog on a specific timesheet of a resource by not using the admin user, but the resource manager
Let me know if that helps,
Anthony