If you are living in Canada as a worker or student and your TRV is about to expire, you must renew your TRV or apply for visitor record. However, visitor record will not allow you to travel internationally and re-enter to Canada. So, if you need to travel internationally and re-enter, TRV is the only solution.

If your present temporary resident status is still valid, you can request an extension of your stay. For any permit (work/study), apply at least 30 days before your existing status expires. The validity of your temporary residence status cannot exceed that of your passport. As a result, you should ensure that your passport will be valid for at least the same period as the requested period of extension.

If you are applying for the TRV within Canada and passport request is received after the application is approved, you can send your passport to the below IRCC office in Canada my mail only.

Please choose the correct mailing address which fits your need:

Canada Post address

Temporary Resident Visa Section
CPC-Ottawa (e-Application)
PO Box 9640
Ottawa, Ontario
K1G 6T2

Courier address

Temporary Resident Visa Section
CPC-Ottawa (e-Application)
365 Laurier Avenue West
Ottawa, Ontario
K1A 1L1

For the detail’s mailing instructions, please follow the instructions below:  

Ref link: https://www.canada.ca/en/immigration-refugees-citizenship/services/application/account/where-submit-passport.html?fbclid=IwZXh0bgNhZW0CMTAAAR07i375w9ZTQDbeLnqzTveTrbBDVBj1NqwOYoDhIB9iAvt13RvFlgHWZJs_aem_H9ypTzKx5f2UgPc8RKS5zg#C

Note: None of the above statements are legal advice and are not meant to be the same for everyone. You must check the latest policy from the IRCC website before applying. Everything is stated clearly on the official website, still if you don't understand something, you can seek legal advice.