I was in a similar situation.Just a quick one if anyone can help- all evidence gathered, form filled in etc ready to send tomorrow. Three-year-old son's Australian Citizenship however has been submitted almost a month and I really wanted it to be completed beforehand so I could start on his passport. Will it affect my application if I declare he is an Australian citizen on my family unit page?
I filled out the we have a 2 yo together but did not add her on my application. I submitted my application with no migrating family. Then worked on her citizenship which came through in less than a month. I was called on the phone and asked a couple of questions. When I went to collect her citizenship certificate, which I then uploaded to immi as evidence to support commitment to each other, I was given passport application forms. We filled those out, and returned them, it took 3 weeks for her passport to come through. I scanned and uploaded that as evidence of commitment as well.