In terms of evidence of animal mixtures being present in samples from the Wuhan market, there have been some reports to suggest that this may have been the case. For example, a study published in the journal Nature in June 2020 found evidence of SARS-CoV-2 virus in environmental samples taken from the Wuhan Seafood Wholesale Market in December 2019. The study also found evidence of the virus in samples taken from some animals at the market, including rabbits and ferret badgers.
However, it is important to note that the exact origins of the COVID-19 pandemic are still not fully understood, and there is ongoing research and investigation into the matter. It is possible that the virus may have originated elsewhere and spread to the Wuhan market, or that other factors may have played a role in the initial transmission to humans.