I don't see how that works. The US funded some of the research in Wuhan and it was done in collaboration with US scientists. If the lab leak hypothesis is true both the USA and China could share the blame.
The original form was almost purely China=bad. Then it has morphed to include some of the US scientists as more information came out.
But specifically most (in the conspiracy group) are trying to tie it specifically to Dr Fauci who became a lightning rod for controversy and political attacks during the pandemic as he became the face of the government's response. Thus it's not all US scientists. Just the ones some don't like politically and who are "in bed with China."
And furthermore, sure the US may have funded some of it, but at the end of the day China is the one who goofed.
Of course, I'm speculating a lot and there are a lot of variations that I've seen for support for the lab leak theory. Just trying to summarize some of the hotter takes I've seen.
I don’t see anything political here. If Fauci and Daszak had come out against dangerous experiments at low biosafety levels we wouldn’t be talking about them.
Sometimes it's in the US, sometimes, it's somewhere else. The goofing is guaranteed, unless you pay somebody to goof on your behalf