China was not. The WHO underestimated it, but there is no evidence to suggest it was intentional.
Unfortunately for you slurpers, the facts is that notwithstanding those shortcomings by others, the administration was REPEATEDLY told by others, including within Trump's orbit of advisers, the truth about the spread of the virus. The alarm was raised very seriously and more than a few times.
But Trump and his team did not want to hear it. They ignored it and downplayed it. A combination of 18th century religious thinking about science and not wanting to burden the economy costs months of preparation on the front end. People died due to Trump and his team's incompetence. Exactly how many is not known right now. But its a lot of people and the tally due to his poor judgment is growing every day.