It is really scary that people are pushing for Google and Meta to be the arbiter of truth. I don't think people realize what they are asking for. Western civilizations have a tradition of liberal free speech, and allowing the courts to sort out the specifics of what speech causes harm to what parties (libel, etc).
There are already laws on the books for false advertising. In the US, the FTC is one who prosecutes those laws, not Google or Meta!
full disclosure: I work on Ads at Google. You really don't want to privatize the prosecution, judgement, jury, and execution of speech laws to mega corps (and I am usually pro-privatization on most topics).