Also waste water samples from Spain and Italy show COVID-19 much earlier than reported in Wuhan.
Spain, March 2019, 1 sample https://www.reuters.com/article/us-health-coronavirus-spain-...
Italy, 18. December 2019 https://www.reuters.com/article/idUSL8N2DW1YK
That being said, I don't know how the origin would help us right now. We have working vaccines. So the solution is to push vaccinations as fast as possible. The origin of the virus isn't that important right now.
It could be that a precursor was already spreading prior to the major outbreak but only detected when it hit Wuhan because so many coronavirus experts were concentrated in that area.