“A Facebook spokesman said: “We don’t believe that it’s an appropriate role for us to referee political debates. Nor do we think it would be appropriate to prevent a politician’s speech from reaching its audience and being subject to public debate and scrutiny.”
Facebook’s decision comes as the rival service TikTok takes the opposite stance. In a blogpost, the social network, whose reported 500 million users would make it the largest in the world not owned by Facebook, made clear it would not be hosting any political adverts.”

Source : Facebook exempts political ads from ban on making false claims | Technology | The Guardian