The public policy on 2020 HCCP/HSWP applicants is simply ; a policy that is meant to exempt 2020 applicants from the requirement of work permit to PR in order to help ircc save time to process 2021 applicants, or their will be multiple year processing delays for 2021 and others yet to apply.
Whether we want to believe it or not..they will do it (grant PR to 2020 applicants who were not processed in 2020). Thats why its called "temporary policy"...its not supposed to be applied on everyone. The aim is to single out portions of applicants/applications (2020 applications) and push them to stage 2 or PR stage, which they believe will help them concentrate on working on 2019 and 2021 work permit applications.
There's been other public policies targeting other types of immigrants; families of victims of air crash, recent international students working in canada, foreigners working in essential services etc see all of them in the link below
https://www.canada.ca/en/immigration-refugees-citizenship/corporate/mandate/policies-operational-instructions-agreements/public-policies.html
Nailed it