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This might be helpful in your case if you PGWP is about to expire:
Source:
https://www.canada.ca/en/immigration-refugees-citizenship/services/coronavirus-special-measures.html
Temporary residents who are currently in Canada are able to apply to extend their status online if they need to extend their status. A temporary resident who has applied to extend their status is allowed to remain in Canada until a decision is made on their new application, even if their initial status expires while they are waiting for that decision. This is called implied status.
They should not travel to a port of entry (POE) to apply directly to a border services officer. Travelling to a POE from inside Canada for the purpose of getting immigration services is not considered essential travel, and they will not receive these services.