Do I get a separate email from the university I applied that they've received my common app?

Do I get a separate email from the university I applied that they’ve received my common app?

and before I sent my common app, the optional report section said ‘started’. If I don’t want to send any optional report, does my counselor just leave it till the deadline or do I have to email the university that I’m not attaching any optional reports?

If they notice few parts of the common app missing (as in school reports and transcript that the counselor has to do) do they still read the common app essay or put those aside until everything’s complete?

Your help is greatly appreciated!

Thanks