There's pretty suspicious circumstantial evidence that SARS-COV-2 came from the Wuhan Institute of Virology: https://www.vanityfair.com/news/2022/03/the-virus-hunting-nonprofit-at-the-center-of-the-lab-leak-controversy
EAs are really concerned about engineered viruses leaking from labs.
Why isn't the lab leak hypothesis discussed on the EA Forum?
Because it probably wasn't a lab leak. See:
https://twitter.com/JohnsHopkinsSPH/status/1558113603080830981