Sorry to jump in with my experience to show the flip side....
I sent my application by by Canada Post Xpresspost on August 11,2020 and they received it on August 13,2020.
I never got a mail regarding the tracking number till I asked for it. 1st by phone (1-800-567-6868) and then by submitting a status check request at
https://secure.cic.gc.ca/rs-vd/stat-eng.aspx
Sept 21,2020 Canadian Passport delivered to my mail box.
Sept 21,2020 Canadian citizenship certificate mailed by Canada Post Xpressport from BC. Expected delivery 1 to 3 business days!!
Sept 23,2020 Canadian citizenship certificate in transit (processed at Winnipeg)
On a side note, they opened my application packet only on Sept 11th and printed my passport on 16th. So they are lightening fast once they open the packet. But unfortunately just another example of how IRCC can be unpredictable.
Hope you get your application processed faster.
Cheers!