Interesting that this is as close as it is, given the other answers. I would have expected more in favor of taking action.
Well, the US didnt "punish" Russia for Chernobyl. Most probably just want pressure put on them to make sure it never happens again.
That is why the pandemic origin deniers' actions are so damaging, they are enabling China to avoid taking responsibility for the leak thereby sabotaging efforts to put in place systems to avoid furture issues.
From my experience, pretty much everyone in the scientific community just wants China to get onboard with basic safety protocols and ethical norms. Lab leaks, genetically modifying babies, growing animals with human brains, etc is turning people negative towards science.
Some are worried that research funding is going to be slashed because of this. Lots of letters are circulating for signatures right now to keep the funds flowing. it's also why so many arent speaking up, they want it to be handled quietly to avoid losing funders.
On the other hand, imagine how all the scientists in France feel who built the lab but knew the Chinese couldnt run it and this was going to happen. Or the Canadian scientists who brought on a visiting researcher who was essentially a spy who acquired Ebola samples from them. Or the family members of those "vanished" in China. It doesnt seem wise to just let this fade away.