I’m not sure how much research you’ve done, but a quick search of “Facebook addiction peer reviewed” shows plenty of results for science backed research into Facebook addiction and the negative impact of being chronically online/on social media.
It’s also probably worth digging into dark patterns used by Facebook and others to keep users coming back/focused on their feed.
I’d also be prepared for the counter argument: “governments are only using Facebook because that’s where the people are”.