Trump isn't President of China. So, not his fault.
No one ever blamed Trump for covid. However, he was rightfully blamed for not acting quickly enough, dispensing terrible advice, and ignoring the experts. He spent all of 2020 focused on his reelection chances.
The Democrats aren't in the habit of blaming world problems on the current US President. That's the RepubliQ shtick--Biden, they say, is responsible for global inflation, the Ukraine war, global fuel prices, hurricanes, earthquakes, and the end of the McRib sandwich.
I find it hilarious that the same idiot assholes who depict Biden as a senile, doddering old man also ascribe to him the power to control the global economy and manipulate world events, bwa ha ha ha haaaa.
Oh, and BTW, Trump's obsessive China-hatred caused him, when he did act, to aim his sanctions and restrictions in the wrong direction, when infections were primarily coming from Europe. The man was/is STOOOPID.