They already have a mobile web interface, that anyone can crate a shortcut to. It'll work fine as-is, with or without a 'PWA' buzzword.

If a government really wanted to block internet access to a service provider, they'd block access to their servers, on all ports. The workaround would be a VPN, not a web interface.

The US has this strange banning-but-not-really, because really banning it would be prohibited by the constitution's first amendment.