It is a good sign. It means you have cleared your eligibility stage. If your background is cleared already, then you may get Portal 1 email soon .
Purpose of the Pre-Arrival Letter
- Notification of Progress: It notifies the applicant that their application has passed significant checks and is in the final stage of processing . This serves as an assurance that the application is progressing positively.
Not sure, I received PAL after one day of AOR (mean in December 2023) and still my case is in progress (Inland)