I don't know if this is common knowledge but there's an equal and opposite theory in China that covid came from the us. I just did a search for "covid us" on Baidu and this is the third result https://zhuanlan.zhihu.com/p/114737709
along with suggested search queries "Is the new crown virus caused by the United States?" "Is the new crown pneumonia a virus released by the United States?"
(crown = omicron, I'm pretty sure)
I think there is a real possibility that covid is a lab leak, but it's impossible to find the truth when everyone is eager to point the finger at (other ethnic group)