Europe should ban American social media companies. They'd be doing themselves a favor, and a favor to most Americans as well (who, shareholders excepted, do not personally benifit from these tech corps being so massive.)
Any democratic country that has a large portion of their population using american social media is essentially a modern US colony.
There is Mastodon already, which is federated. EU already set up their own servers.
You don't need an A+ protocol to get great if your product is good enough / dead simple to use but neither of those things apply to Mastodon, as much as I'd like them to.