That isn't the only place they should look.
But investigating research involved in the origin of the virus indicates that the Government either strongly suspects or knows this was a lab made chimera, and not a natural recombination.
Two of the researchers involved in
https://www.nature.com/articles/nm.3985 were from the institute of Virology at Wuhan.
There may have been little or no CCP involvement other than planting the researchers.