Trump often blamed the pandemic on China. Philippe Lemoine looked through the evidence and presented it on Quillette. And frankly, there is no hint of any conspiracy or coordinated effort to hide the truth. There are indication of fuckup of local authorities though, but nothing that prevented the circulation of information for more than a few days, a week max. There is indication that national chinese authorities didn't knew about this before December 30th, one day later they announced it officially to the world.
https://quillette.com/2020/08/24/the-china-syndrome-part-i-outbreak/