Thank You Southlander! Yes that was a typo, should be June 2020. My application was submitted in Feb 2020, with medicals and PCCs submitted in May-Jun 2020. I am sure my PCC was expired therefore I received an email from CO to update my PCC.
My agent handled my application and he was the key contact with IMMI department. Based on his experience, CO will only request to update PCC and medicals right before the visa grant, that's why he worries that even I will be granted a visa soon, I cannot travel to Australia due to border closure. But thank you for your suggestion, you are right, I should consider competing the spots with all those backlogs plus the newly submitted applications.
I am from Hong Kong and not sure if the fast tracking of my application is related to this news: https://www.sbs.com.au/chinese/english/federal-government-confirms-fast-tracking-of-hong-kong-skilled-visa-applications