So further to this, CPC Sydney has now returned my applications citing they are 'stale-dated', meaning they received them 90 days after signature.
The thing is, they received it together with my PR card replacement application in the same envelope in June 2020, but then misplaced the citizenship applications, and only rediscovered it on Oct 19, by which time it was stale, and I only received them back now. Quite frustrating, but at least I know where I stand now.
So, please update the spreadsheet. I'll resend today and move to the February 2021 thread. Good luck everyone!