Mark Zuckerberg once considered deleting ALL of your Facebook friends and making everyone start over.  The "friends" aspect has been declining, and they wanted people to reconnect with that. He suggested the idea back in 2022, because the SOCIAL aspect of Facebook was declining.  The thinking was that this could encourage users to reconnect with Facebook, while rebuilding their social connections.

t wouldn't have been the end of the world to re-add your close friends and family members but it might've been difficult to reconnect with that one random person you hooked up with or met back in the day or last week.

With Instagram becoming more of a "message app", you are seeing less of your friend's content on Facebook and more of a suggested content and reels. Social media is once again evolving.