If Chinese state actors are culpable for the pandemic, it seems plausible other nations will seek damages from the Chinese government. If not paid, they may levy fines on commerce from Chinese companies.
However, I'm still very skeptical of "lab leak", I think the zoonotic origin is most likely. If the zoonotic origin resulted from poorly regulated wet markets, however, Covid is just as much a result of bad government policy by China as in the lab leak case.
China needs to convince the world that they have taken steps which will prevent Covid from ever happening again. At a minimum, this includes tightly regulating wet markets so that animals will be "socially distanced" with good ventilation, if not banning wet markets altogether. If China is unwilling to do this, they present an ongoing pandemic risk, and it seems reasonable for the rest of the world to restrict travel to China until they comply.