Many such countries already block traffic with ECH entirely. There's no technical solutions to a polical problem.

I remember when you can just change your DNS provider to bypass censorship. Nowadays, browsers and OS provide safe DNS by default, and thus censors had mostly switched to DPI based method. As this cat and mouse game continue, inevitably these governments will mandate spyware on every machine.

These privacy enhancements invented by westerner only work for western citizens threat model.