This story is and always has been a gigantic nothing-burger. The science is not settled, which means many hypotheses could be true or could be false.
The problem, is who the fuck cares? Is there any difference whatsoever if its man made or natural, in how we should act or what decisions we should make? Can we do anything to prevent bio engineering in a foreign country?
No. No, there is no practical difference, no, we cannot prevent research in other countries, and we probably shouldn't even try since the goal is not practical.
One gigantic red herring.