Facebook posts on its page that they will be alerting you if they think the government is trying to breach your account.
“While we have always taken steps to secure accounts that we believe to have been compromised, we decided to show this additional warning if we have a strong suspicion that an attack could be government-sponsored. We do this because these types of attacks tend to be more advanced and dangerous than others, and we strongly encourage affected people to take the actions necessary to secure all of their online accounts, the announcement said.”
With that said, the Login Approvals will make sure that no one else could gain access to your account by blocking other devices trying to do so. If someone wants to log in, Facebook will send a code directly to your registered phone that needs to be inputted before successfully logging in. This ensures that only you and anyone you authorize could have access to your account.