August 11 to now is not necessarily unusual for an AOR.
IRCC says the AOR is sent only after they receive the application and confirm that it is complete. If the application is complete, they issue an application number and AOR and then begin processing the sponsorship and permanent residence portions.
For spouse/common-law sponsorship cases, IRCC also notes that processing times vary based on application volume and case complexity. Their recent published data says spouse, partner and child applications submitted inside or outside Canada and destined outside Quebec were being processed in about 15 months overall, but that is the total application timeline, not the AOR timeline.
So at this stage, I would just keep monitoring the email account and portal. Once the AOR arrives, you’ll be able to use the application number to track the case more easily.