Civets at the very least are known to be the host for SARS-CoV virus that jumped to humans. The first affected people all had in common the market, and not the lab. Samples from the market in early 2020 found a lot of SARS-CoV-2 everywhere, specially at stalls that were selling poultry and racoons. The market was stuffed with animals. As poor as the security was in the lab, the market was orders of magnitude worse.
I might be wrong but I swear I read they never found cov 2 in an animal that could transmit to humans
And of course the Chinese government restricts access--there's no way to prove a negative, thus no way to exonerate them. No matter what investigators are allowed to see there will always be the allegation that they aren't being allowed to see the important stuff.