Singal is centralized? Can't they just block it at the border? I understand VPN or whatever, but if they're serious I hear there's a couple of countries with "pretty good" border firewalls.
Doing that would eliminate so many Swedes from Signal...
I haven't found a VPN solution for iPhone users in a couple of US states. It's like iphones are actively hostile to the very idea of a VPN. Or at least "self-hosted VPN", maybe the $20/month VPN work but that's... Sketchy.