Sharing my experience landing in Canada from USA
I travelled from Indianapolis to Toronto with connecting flight in Charlotte using American Airlines. AA was not allowing me to check in online. So, I had to complete the check in at the airport. They checked my visa and COPR and issued me the boarding pass. Once at the gate, they have again verified by visa.
Once I landed in Charlotte, I immediately had a connecting flight and headed to the gate. For some reason, they could not clear me to board in as the system was not allowing them to clear my boarding. They called another officer to check my eligibility to travel and were trying to confirm the same with American Airlines internal immigration customer service. I provided them a printout of the following page which indicated that I could enter Canada as my PR was approved before March 18th. They verified my PR visa and COPR again and let me through. The flight was delayed by 5 mins as they were trying to figure out whether they should let me board or not.
After landing in Toronto, we directly head towards immigrations with a covid-19 declaration that is provided on the flight. The first officer checked my passport and asked me if I had a quarantine plan and if anyone else was living with me and let me through to the next officer who collected my covid declaration. The Covid declaration has questions like, if you have fever, cough, difficulty breathing etc.
Then I proceeded to another officer who processed my landing and asked some basic questions like if I was convicted of felony in any country and if I had access to more than $10000 cad. The officer stamps and signs both the COPR copies. They keep one copy and return the other. That makes you officially landed PR. Then I headed to another officer who processed my Goods Accompanying and Goods to Follow. At the end of every stage, each officer asks you to confirm about quarantine plan and I was told that the day I landed is day 1 of the quarantine.
Finally got an uber and reached my Airbnb. I have ordered food and groceries online and added in delivery comments to have it left at the door. I have received a phone call today from Public Health Office and they asked me questions about my quarantine like, whether I directly came to my place of quarantine or if I stopped anywhere, whether I had any visitors, if I got access to food.
I use a T-mobile plan in the US. I can make/receive phone calls, but data plan does not seem to work. After my flight landed, it took about 15 mins for the signal to show up.
Hope this helps!