I received my ppr request email on 7th November and then I submitted my passport on 10th of December and received my passport on 24th of December
Precious to this I went to the pool on 11th of November 2018 and received my ITA on October 2019 and submitted my file for PR on 22nd of November 2019. They requested some documents on May 2020.
This the whole timeline I guess you are asking about.
I have exactly same timeline as yours except for receiving the returned passport. Were your medicals updated in GC key before PPR? I also got PPR on 7th Nov but my medicals were not updated. My passport reached IRCC on 9th Dec and as of now no update. my original medicals expired on 19th Nov 2020 (as per GCMS).