Completely reasonable differences in opinion about the risk, origin, or proper mitigation of COVID were blasted as “misinformation” before they were eventually accepted by the wider establishment. The initial rush to completely censor such discussion early on is what caused all this free speech ruckus.
There’s always been nutty conspiracy talk, scams, hoaxes, lies, ignorance - especially on the internet - and we’ve learned to filter it out.
The “misinformation” label is going to backfire, though. Instead of ignoring it, people are going to take a closer look, because there’s probably something there that the labeler finds inconvenient. If it was simply untrue, then say so, call it “not true” or a “lie.”
Instead, “misinformation” is this kind of 1984-ish weasel word used to discredit inconvenient facts while maintaining plausible deniability when they turn out to be correct.