Okay..
So, my migration agent submitted 1 EOI on 27/10/2021 for both 190 and 491. However, reading many comments I decided to submit a separate EOI for 491 which I did on 23/11/2021
It just so happened that today 13/01/22, I got a pre-invite for my 491 visa.
EOI submitted - 23/11/2021
Regional area visa 491
Construction Project Manager - 75 + 15 = 90
For some reason even though I submitted my application one month later that my agent I got invited and they have not. So my guess is that is way better to submit applications separately.
The downside of doing so I suppose is that the chances to get the 190 are lower because they might send you the invitation for the 491 first. However, I do not know if by submitting the applications together the invitation for the 190 will eventually be sent but later or not at all. I feel is more risky that way specially if your current visa is expiring soon (as mine)
Hope this help.