Reuters "Fact Check" is a joke and that goes for most "fact checking" outlets.
In the case of Reuters Fact Checking on Covid, a good question to ask yourself is "Qui Bono".
Reuters CEO from 2012 to 2020, James C Smith is a board member of Pfizer. Does anyone really believe that any thing other than the sanctioned narrative regarding the pandemic will be published in Reuters? Another board member is Scott Gottlieb the former FDA commissioner and another former FDA commissioner sits on the board of Moderna, Stephen Hahn.