Thank you for the information. I actually replied to the email address that the test invite came from, and their reply was:
PLEASE NOTE: This email address is only monitored for applicants who have received instructions from IRCC on or after November 27, 2020.
If you have not been contacted by IRCC on or after November 27, 2020, you can check the status of your application
here.
Thank you
So, I'm guessing this email won't be helpful in my case. Will give it a couple of more weeks as it's only been two weeks since DM.