What's so special about Facebook? Before Facebook there was MySpace and before that there were others. During Facebook there were many competitors, some big, some small, but Facebook managed to hold out the longest.
Years before Facebook introduced DMs people were chatting on MSN and video calling over Skype. MSN and Skype were everywhere before Facebook took over, and if they weren't, alternatives like AIM were.
There's nothing technologically or ideologically superior to Facebook. Most new and interesting features have been a result of acquisition rather than internal drive for advancement. Facebook rolled out calling in 2013, three years after Skype did. Skype translator came out in 2014, Facebook added their version in 2018. Google Chat introduced a translation bot all the way back in 2012.
Their current quest for innovation centers around the Metaverse, something nobody but Facebook seems to want to be a thing. Even that is just the unholy amalgamation of Second Life and VRChat. The big difference there is that people actually use Second Life and VRChat.
Facebook made the best business model out of scraping the stuff people somehow fed freely into their system. It's one of the few remaining social media companies, that's it. None of the inventions you quoted were done by Facebook, they just copied features others thought out and merged them into a single place to become the bloated tech giant it is today.