I guess mine was in review required from Sep 2020 till Feb or Mar 2021. My overall PR processing time from ITA to PPR was a few days less than 6 months though despite this so it did not cause a big impact as such.How long was you in review required? Mine is coming up to six months of being in review and 8 months from aor and my file hasn’t been touched.
Your file is being processed in the middle of the pandemic with IRCC a little understaffed ( I assume) so I think that is what is causing the delay.