no it is NOT a clear answer, it's the agents opinion and this whole interaction is not confirmed and NOT official guidance. The CLEAR thing to do is STAY HOME. It doesn't matter if your country is in a lockdown or not. You WILL get your PR visas extended regardless of why you didn't land before your visa expired.Interesting post thanks to @prusa
Guys - after much wait I was able to connect to an IRCC agent and I have some news for the folks in USA.
I asked about inability to travel and she said our policy is when you can come you should come.
She said per current travel restrictions, since your COPR was approved before March 18 you are exempt to come in and because you are in USA so there are no travel restrictions of travel from USA to Canada. So for you I would say you can come and you should come before your COPR expires.
I did say about the risk of virus and all, but she was adamant that there are no restrictions for your travel and you should come.
So.. I guess this is a clear answer for anyone where the home country has no lockdown.
STOP giving advice on landing in covid-19. Everything you said on this subject has been useless and you probably have already caused enough panic.