This has some interesting comments on the "first isolation of covid-19 outside of china" done by Doherty institute in Aus (and subsequently shipped all over the world). It's not a traditional isolation, it's a completely unscientific frankenstein mix they've grown cultures from and then "tested" with PCR..
https://www.fluoridefreepeel.ca/australian-dept-of-health-has-no-record-of-covid-19-virus-isolation/
I'd be interested in similar info about other alleged isolations, if there are any.