What is considered "misinformation" depends on whatever the censoring authority in question (e.g. Facebook or YouTube or some news website) _believes_ to be misinformation.
For example, in 2020, the WHO(!) Twitter account literally tweeted that masks don't work. That same statement would have been considered medical misinformation by a different authority.
Another example: the theory that Covid leaked from a lab in Wuhan which was known to do gain of function experiments on coronaviruses was painted as a wacky conspiracy theory by most of the mainstream media, despite the fact that many respectable sources (e.g. the CIA) later concluded that it has a significant amount of plausibility versus the alternative Wuhan wet market hypothesis which required that the virus somehow arrived there from a bat cave more than a thousand kilometres away.
For example, in 2020, the WHO(!) Twitter account literally tweeted that masks don't work. That same statement would have been considered medical misinformation by a different authority.
Another example: the theory that Covid leaked from a lab in Wuhan which was known to do gain of function experiments on coronaviruses was painted as a wacky conspiracy theory by most of the mainstream media, despite the fact that many respectable sources (e.g. the CIA) later concluded that it has a significant amount of plausibility versus the alternative Wuhan wet market hypothesis which required that the virus somehow arrived there from a bat cave more than a thousand kilometres away.