The Temporary Public Policies mentioned in this quota are indeed for the TR2PR Pathway implemented in 2021, these numbers represents the amount they are going to be admitting from those accepted applications, therefore, when the new pathway is announced in September, it will either unfortunately further reduce spots from the FHS quota, or add a separate category to the quota.
Under the immigration levels plan page, there's a link giving details to the public policy mentioned.
https://www.canada.ca/en/immigration-refugees-citizenship/corporate/mandate/policies-operational-instructions-agreements/public-policies/trpr-international-graduates.html
It clearly mentions it's the public policy that came into effect May 6, 2021 until November 5, 2021.
In conclusion, we might see FHS targets further slashed down. I am hoping they just add more to the targets instead of slashing further from FHS, but IRCC and having hope don't seem to be things that go together.