Hello,
I think many of us here face this difficulty. I submitted my application almost 5 months ago in March. Back then, my status was fine. In my previous post, I mentioned that I submitted a web form last week to inform IRCC about the fact that I have applied for OPT to maintain my legal status in the U.S. given the extreme difficulty to go home. I have also attached relevant documents such as updated I-20, I-94, and a receipt from USCIS. About 3 days later, IRCC replied to me, and they told me that they will forward the new documents to the responsible office for consideration.
IRCC started reviewing my application one day after I submitted my biometrics, but I still have not received any correspondence letter or any other updates.