You can find the answer to your question here https://www.canada.ca/en/immigration-refugees-citizenship/corporate/publications-manuals/operational-bulletins-manuals/service-delivery/file-transfer.htmlthe slowest office in processing PGP application and reply to any query on webform is Vancouver , Canada . Can we request to ircc to change the processing application to any other location ?
My file recently got transferred from Mississauga to Montreal and I've heard that the Montreal office is also slow.