In my country, unless you're compensated specifically for your silence you're free to ignore such clauses. An employment contract can be definition never restrict you from doing anything after your employment has ended. Employers try to put in nonsense such as non-compete clauses by they are always toothless.

This is a little different than a noncompete though. Those are hardly enforceable in the US either.

You mean to tell me in your country there is nothing to prevent you from quitting your job and then next day writing up and publishing full detail reports about internal operations?

meta being so big they're almost part of public institution just privately held; and public scrutiny is less frowned upon especially if many believes they do not contribute to the betterment of the republic