Huh? Claiming something is true because a government supports it, is quite possibly the most cut-and-dry definition of an appeal to authority I've ever seen.

Governments aren’t banning or restricting it because “god said it was bad”. Nor is the GGGP arguing that we should take it seriously because governments do so. Those would be specific appeals to authority. The GGGP argument uses examples of cases where social media has been taken seriously enough to result in government regulation to directly rebut the GGGGP’s claim that social media is only being discussed on substack and not more broadly.

"several democratic governments"