I'm curious, are they notified when their ads are taken down? Or does facebook do "shadowbanning" themselves? I'd expect them to do it when nation-state interes

I'm curious, are they notified when their ads are taken down? Or does facebook do "shadowbanning" themselves? I'd expect them to do it when nation-state interests are involved, but I guess nothing stops them from taking in the money from the regular folk and lying about ad impressions when an ad goes against their interests.