Ok. I heard that RROC is for processing the applications in NOCs that are essential to Canada.
Sending your application there can have two sides, 1) They are trying to balance the workload of processing PR applications to all resources available
2) They are expediting processing your application
Either way, your application is moving forward and you should stay positive.
You can find more information about RROC here:
https://gcmsnotes.com/all-about-the-visa-office/
(Check the section What is RROC?)