I think I know I got allocated a case officer before my Migration Agent lol. I called Immigration to find out and then told my agent I got allocated I found out I got a CO by myself, I just called Immigration and they told me the name of my CO. How ironic, as I even knew this before my Migration Agent lol. So I just emailed my Agent to follow up and contacted CO for me.
Once you authorised your Migration Agent to act on your behalf, you won't be able to see any requested documents on Skillselect EOI page, as all communication now is between CO and your migration agent. I logged in to mine as well and the status is just "lodged"
I think you will need to contact your Migration Agent to follow up on this, just like I did