Just got the email from my MA, the application is granted now.
Btw, our medical checks were expired about 2 months ago, and the police checks of one country we lived before were also expired 2 months ago. They didn't request new. So if you are in a similar situation, it is worth to wait.
It's really a long 8 months waiting. But, It's hard to complain, as I understand many people's situations are much worse during the pandemic time. I has been keeping praying to stay faithful and positive during the hopeless waiting. I believe Australia needs you guys to contribute to the economy and recovery. Stay positive and be strong.