Does any one know is this AOR-2 considering my file was showing received from 03/11/2020 till 18/11/2020.
ECAS just changed to Application received.
Personally I don't think AOR2 is that meaningful as a step - there is too much inconsistency between visa offices and what they are doing (heck, some files are not even getting formal sponsor approval letters recently).
So people interpreting 'this just changed in ECAS' to mean that it's the same as AOR2 is tea-leaf reading and trying to fit what signs come from the system into a notification structure that is no longer universal to all files.
I can understand that - everyone wants to know what something is happening and benchmarking it against other files (and the spreadsheet trackers encourage that).
I'm not saying it's wrong - maybe they are the equivalent of AOR2. But maybe they're not; it could just be a database thing.
If it makes you feel better to have some sense of the process by interpreting this change in status, that's a perfectly valid response. (That said I did get an AOR2 by email).
But it could be the spousal PR application equivalent of "there was thunder today, Zeus and Ares must be hurling boulders at each other on the far end of that mountain range." Which apparently made the ancient greeks feel better.