In my case, the AOR and SA came via email to the Sponsor. Biometric request came via email to the PA.
I'm sorry but I'm not sure what advise I can give you on your situation, maybe you could try calling IRCC and speak to an agent?
*UPDATE* Just received AOR and Biometrics request as well.
Submitted Application - 03rd July 2023
AOR - 07th Sept 2023
Received SA - 07th Sept 2023
Biometrics Requested - 07th Sept 2023
Submitted Application - 03rd July 2023
Received SA - 07th Sept 2023
No AOR, but the SA letter contains UCI etc.
Hope this means most of this group will be hearing back soon! Good luck all.