@Infrapink The White House would probably love to set up its own Fediverse instance, but first they’d have to harden it against hackers, ensure it passes accessibility and archival requirements under federal law, and a whole bunch of other stuff that might well involve forking the server software to make sure it’s done right.
There are a LOT of federal laws governing how official websites look and behave, and a lot more bureaucracy to ensure it’s been done: https://digital.gov/resources/checklist-of-requirements-for-federal-digital-services/
they could ask the German government how they do it. https://social.bund.de/explore