What documents they will ask graduation letter, diploma and transcripts?It’s really upto you. To ensure success in PGWP approval at the border make sure that you have all the documents that the border officer will need. I have read horror stories when it comes to meeting a CBSA officer without proper document preparation.
Disregard the Sept 22, 2022 date (IRCC thinks it can process work permit applications in 120 days, which is not true since it’s taking 160+ days) you can work anywhere you want until you receive a decision regarding your application.