Got COPR for my mother in PGP category on Dec 15, 2019.
Requested inland appointment Dec 16.
Got response from IRCC that they forwarded my request to Etobicoke IRCC and Etobicoke shall respond in 6 weeks.
Decided to do flagpoling instead for Sarnia entry.
Started journey on Sat Dec 21 at around 8am. Arrived at the blue water bridge toll at 1pm after stopping for lunch. Long line at bridge due to holidays. Took an hour and half to cross the bridge.
At US border officer asked
Where are you heading. I told my mother would be like to do flagpoling and I am assisting her.
(I had US visitor visa) my mother did not.
I was asked to park my vehicle and just take passports and go in the office. Car keys and mobile to be left inside car.
Went inside office. Mom was given white paper stating denied entry to USA.
Officer then asked us to walk out with him to other direction going towards Canada . Car was already brought there by the officer. All process took about 30 mins or so.
We left for Canada. Arrives at immigration. Officer lady asked purpose of visit. I told my mother is landing and I am assisting. She is asked to go in the office building.
Went gave the passports copr of my mother. I had PR card that was expired, but had valid copr document. Gave all that. Waited from 3:30 pm to 4:30pm.
Not sure why they weren't calling us. Anyhow at 4:30 the lady officer called and got my mother copr signed.
Told her to get a new sin and get OHIP as she was eligible. (she was in Canada for more than 180 days physically present in Canada on supervisa prior to getting copr.
Got all done in a day. It was long but at least didn't had to wait for inland landing.
After returning back I saw email from Etobicoke IRCC office that they gave my mother appointment for January 7, which obviously will now be have to be cancelled.
Just sharing my experience for Sarnia landing.