I'm still waiting for the portal since May after submission of all the required documents in June.
We didn’t need to submit the documents for stage 2 after AIP.My lawyer notified Niagra office that all the requested documents were submitted upfront such as Medical,PCC,RPRF. They passed medical and criminality within week after my Aip issuance.I think they are fast at stage 2 as it is the only stage for Criminality check with RCMP and home country police authorities.Also, simultaneously CBSA and CSIS do background checks for HIRV, any serious criminal activity or involvement in organized group crimes .It’s basically for the security of Canada and the for the purposes to identify the threat.
They don’t decide your application whether to approve or refuse.They just basically forward the information to Immigration Officer about the Checks and if everything is ok and applicant is admissible to canada on all serious grounds like A34,A35,A39 .Then officer creates the COPR portal for picture upload to issue permanent resident card.
That’s the process for stage 2 I think as my lawyer discussed with me.