There is simply not enough available evidence to ascertain the origin of Covid 19 in humans. -There's the Wuhan wild meat market theory -There's the Wuhan Lab Leak theory -There's Northern Italian origins theory -There's the US 'gain of function' labs theory
Etc Etc.
IMO either China or the USA are in a better position to track/qualify the origin of Covid-19 and neither Government Authorities have enough evidence to nail it down; otherwise we'd have heard from either side by now, IMO.
And of course there are the conspiracy theorists who will maintain the fault lies with one side or the other and/or a major cover-up by one side or the other
Will we ever find the source?........who knows?
IMO, the Chinese authorities are best positioned to scientifically analyse samples from those who first contracted the disease and those DNA samples will be critical in tracing the virus' genetic code back to its initial trans-species source